Free percent videos online

Find here free online math videos on percent-related topics: what is percent, percentage of a number, discouns, sales tax, and percent of change. The videos are recorded in high-density (HD) and are viewable both here as well as at my Youtube channel.

These videos are usable for students, teachers, and parents. You can use them...

• To learn these topics yourself (if you're a student for example, or an adult needing a refresher)
• As lesson plans for teaching these topics. Often, one video from below can be made into several lessons with students.

The videos match the lessons in my book Math Mammoth Percent (Blue Series book), or the lessons in chapter 9 of Grade 5-B (Light Blue series), or chapter 6 in Grade 6-B (Light Blue series). In any of those books, you will get MANY more practice exercises, word problems, and puzzles than what are shown in the videos, and also some lessons that are not in covered in this set of videos.

65 pages (includes answers) PDF download $3.50 Printed copy $10.60, b&w

Math Mammoth Percent Sample pages (PDF) Contents and Introduction Review What Percentage...? Percentage of a Number Discounts Percent of Change Buy download at Kagi (credit cards, Paypal, check, cash, PO, wire transfer, money order; see Kagi shopper help) Buy printed book at Lulu (credit cards, Paypal, PO) Este libro en español

Percent

What is percent? I show how to change percents to fractions and vice versa.

Percent of a Number

Find how to solve various percentages (percent of a number or quantity) using mental math. First, find 1% or 10% of the number, then you can find any percentage of the number.

Percent of a number using decimals

I show how to find a percentage of a number, such as 8% of 5,000, using decimals. We change the word "of" into multiplication and the percent into a decimal. Then you just multiply using a calculator, mental math, or paper & pencil.

What percentage / How many percent?

To answer these kinds of questions (How many percent?/What percentage?), first write the PART being asked. You can replace the question in the problem with, "What part...?" Write that as a fraction. THEN, simply convert that fraction into a decimal and on into a percent.

How to calculate discounts

I explain how to calculate the discounted price when we know the discount percentage. I use mental math in many of the examples.

How to calculate sales tax

I show how to calculate the final price when you know the sales tax percentage. I show a few examples of using mental math and a few to be done with a calculator. I also show how to make this into a single calculation instead of first calculating the tax and then adding (which is two calculations).

Percent of Change

I explain how to calculate percent of change (percent change, percentage change) when the initial and final quantities are given. The main formula I use is to calculate the difference in the quantity divided by the original quantity. Then this fraction is written as a decimal, and as a percent.

Percent of Change - Applications

I solve two word problems that involve percentage change - one having to do with percentage increase in area, and another with two separate discounts.

Comparisons with Percent

I explain how to solve problems that ask "How many percent / less / heavier / cheaper / taller is one thing than another?" We are comparing the two quantities, and we need to find the percentage difference between them. The general formula is: (difference of the two quantities / reference quantity). This gives us a fraction, which we then convert into a decimal and then into a percentage.

The videos match the lessons in my book Math Mammoth Percent (Blue Series book), or the lessons in chapter 9 of Grade 5-B (Light Blue series), or chapter 6 in Grade 6-B (Light Blue series). In any of those books, you will get MANY more practice exercises, word problems, and puzzles than what are shown in the videos, and also some lessons that are not in covered in this set of videos.

65 pages (includes answers) PDF download $3.50 Printed copy $10.60, b&w

Math Mammoth Percent Sample pages (PDF) Contents and Introduction Review What Percentage...? Percentage of a Number Discounts Percent of Change Buy download at Kagi (credit cards, Paypal, check, cash, PO, wire transfer, money order; see Kagi shopper help) Buy printed book at Lulu (credit cards, Paypal, PO) Este libro en español