Question

HELP ASAP

1. 30% of what number is 72?
2. 10% of what number is 60?
3. 70% of what number is 56?

Answer 1

1. 240, 2. 600, 3. 80

Explanation:

1. In algebraic form, this is 3/10 * x = 72, which equals to x = 10/3 * 72, which is x = 240

Answer (1.) = 240

2. In algebraic form, this is 1/10 * x = 60, which equals to x = 10/1 * 60, which is x = 600

Answer (2.) = 600

3. In algebraic form, this is 7/10 * x = 56, which equals to x = 10/7 * 56, which is x = 80

Answer (2.) = 80

Answer 2

1. 240

2. 600

3. 80

Explanation:

In each problem, let x = unknown number

1. 30% of what number is 72?

0.3x = 72

x = 72/0.3

x = 240

Answer: 240

2. 10% of what number is 60?

0.1x = 60

x = 60/0.1

x = 600

Answer: 600

3. 70% of what number is 56?

0.7x = 56

x = 56/0.7

x = 80

Answer: 80