The product of a number and 3 is 7.5. What is the number?

Question

First, write an equation to describe the situation.
+ - . ➗ = n 3 7.5

Answer 1

n * 3 = 7.5

Next, solve for n:
n = 7.5 / 3
n = 2.5

Therefore, the number is 2.5.

Answer 2

2/5 of a number is 16. What is the number?
First, write an equation to describe the situation
+ - . ➗ = m 2/5 16

Answer 3

m * 2/5 = 16

Next, solve for m:
m = 16 / (2/5)
m = 16 * 5/2
m = 40

Therefore, the number is 40.