Join Vince Kotchian for an in-depth discussion in this video Percent basics, part of Learning Everyday Math.
- In this movie, I'll explain what percentages are,…and how they're useful for math.…You'll learn a few different methods…for finding percentages of a number.…So the first thing I want you to know…is that, just like decimals and fractions,…percents are parts of a whole.…So, for example, 44% is…the same thing as 44 parts out of 100,…or the same thing as .44.…So percentages are just a different way…of showing how much of the whole we have.…
And for percentages, we think of the whole as 100%.…So it's 44% out of 100%.…So the next skill I wanna show you with percents…is how to take 100% of something,…10% of something, and 1% of something.…So let's say I have the number 876.…Well, 100% of something is all of it.…So the decimal point in 876 would naturally be here.…So to take 100% of it, I would just leave it where it is.…
100% of 876 is 876, really easy.…Now, to take 10% of a number, I take that…decimal point, and I move it one space…to the left and rewrite the number.…So if I rewrote that number,…it would now be 87.6.…
- Practicing mental math
- Understanding decimals and fractions
- Working with percentages and ratios
- Solving equations
- Calculating area and volume
- Scaling recipes
- Estimating your running speed
- Calculating the area for home-improvement projects
- Working with probability
Skill Level Intermediate
1. Math Foundations: Part one
2. Math Foundations: Part Two
3. Math Foundations: Part Three
4. Shopping and Cooking Math
5. Health and Fitness Math
6. Home-Improvement Math
7. Probability and Counting Math
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