This chapter was about percents and how to use them in real life to solve many of the problems in ... well, real life.

You can represent percents using a hundred grid - 4.1

1 grid = 100%

This grid shows 50%

Percents can also be written as fractions and decimals - 4.2

50% = 1/2 = 0.5

To calculate the percent of a number, write the percent as a decimal and multiply it by the number - 4.3

50% of 100 = 0.5 x 100

50% of 100 = 50

To calculate the increase in a number - 4.4

- You can add the combined percent amount to the number original number-

12% of 100 = 0.12 x 100 = 12

100 + 12 = 112

- You can multiply the original number by a single percent greater than 100-

112% of 100 = 1.12 x 100

112% of 100 = 112

Here is my video:

Here is my link to a website that helps you with percents.

Hello. I'm sorry if the problems were cut off in the video. Here they are:

ReplyDeleteThe front wheel of a tricycle is 155% bigger than the rear wheels. Use hundred grids to show how the wheels compare.

The cost of a downloaded game was 10.99. Added to this was a 10% before tax processing fee, 5%GST, and 7% PST. What was the total cost of the downloaded game?

The number of caribou in a particular herd was monitored over a two-year period. The first year, the size of the herd was 30 000. The second year, the herd was estimated to be 90% of its original size. What was the approximate size of the herd in the second year?

What is a better deal:

A) 60% off a pair of shoes.

B) 20% off a pair of shoes, then a 40% reduction of the reduced price.

I hope the video was to your liking.