Question

Eighteen is 90% of what number?​

Answer 1

Answer is 20

Step-by-step explanation:

We already have our first value 18 and the second value 90. Let's assume the unknown value is Y which answer we will find out.

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

STEP 118 = 90% × Y

STEP 218 =

90

100

× Y

Multiplying both sides by 100 and dividing both sides of the equation by 90 we will arrive at:

STEP 3Y = 18 ×

100

90

STEP 4Y = 18 × 100 ÷ 90

STEP 5Y = 20

Finally, we have found the value of Y which is 20 and that is our answer.

Answer 2

Answer is 20

Step by step explanation-

STEP 1

18 = 90% × Y

STEP 2

18 = 9/100*y

Multiplying both sides by 100 and dividing both sides of the equation by 90 we will arrive at:

STEP 3

Y = 18 × 100/90

STEP 4

Y = 18 × 100 ÷ 90

STEP 5

Y = 20

So your answer is 20