Percent of Change

BELL RINGER:

At Emily's summer camp, there were 80 girls and 12 counselors. At this rate, how many counselors should they have for 100 girls?

What ratio should you use to determine the percent of change?

Once you have divided the amount of change by the original amount, how do you change your answer to a percent?

Let's try one out:

A pair of Adidas shoes is on sale! The original price of the shoes was $120, but now they are $78. What was the percent of the discount (percent of decrease)?

And one final one before you try some on your own:

In the Winter, Luna picked 125 apples from her apple tree, but in the Summer, she picked 175. By what percent did the amount of apples she picked increase?