Question

If 50% of a number is 150 and 30% of the same number is 90, find 80% of that number.

900 students attend Ridgewood Junior High School. 25% of students bring their lunch to school everyday. How many students brought their lunch to school on Thursday?
Divide/scale down to solve for the missing percent.

Answer 1

A. 240

B. 225

Explanation:

50% of ? = 150

80% of ? = 150 x (80%/50%)
80/50 = 1.6

%/% = 1

1.6 x 1 = 1.6

80% of 300 = 150 x 1.6

150 x 1.6 = 240

80% of 300 = 240.

25% of 900 = ?

900 x 25 = 22500

22500/100 = 225

900 x 25% = 225

225 people bring their lunch to school on Thursday.

Answer 2

5/100x900=180

Explanation:

answer 180