7-7/7-8 percents

of a number

Indicator N7 – Solve Problems using percents

Using Equations

Of (*) Is (=) What (n)

1) 67.5% of 78 is what number

0.675 * 78 = x

52.65 = x

You Try

Find 250% of 50

Using Proportions

Percent Proportion ---- % = is 100 of67.5% of 78 is what number 67.5 = x (candy canes) 100 78 100x = 5265 100 100 x = 52.65You TryFind 250% of 50

2) $3 is what percent of $40

Equation

3 = p*40

40 40

0.075 =p (need to change to %)

7.5% = p

Proportion

n = 3

100 40

40n = 300

40 40

N =7.5 % (already the % because out of 100)

Which method did you prefer?

Equation?

Proportion?

What % of the class liked the same method you did????

How many students chose hockey?

How many students chose volleyball?

180 students were

surveyed

• 7-7/ 321 / 10-20 e, 21-31 (omit 24)

7-8/ 325/ 8-24 e