Lesson Steps:

1. 50 is 20% of what number?
20% x =50
(20/100)x = 50
x = 50 X 100/20
x= 250



2. What number is 70% of 250?
(70/100)X 250
7 X 25
175

Answer:

50 is 20% of 250.
175 is 70% of 250.

Grade: 7
Level: Middle school
Subject: Math
Topic: Percent proportion