9.0k views
0 votes
When a number is decreased by 3.5%, the result is 91 what is the original number to the nearest tenth

2 Answers

3 votes

Answer:

87.8

Explanation:

So you have to multiply 91 times 3.5 which equals 318.5

91 × 3.5 = 318.5

Then divide 318.5 by 100 which equals 3.185

318.5 ÷ 100 = 3.185

Next subtract 91 by 3.185 which equals 87.815

91 - 3.185 = 87.815

Last Round 87.815 to 87.8

87.8 should be the answer

Hope this helps

User Javier Haro
by
8.0k points
3 votes

Answer:

The number is 94.3 (to the nearest tenth)

Explanation:

Let the number =x

When x is decreased by 3.5%, we have:

(100% of x)-(3.5% of x)=(100-3.5)% of x =96.5% of x

When a number is decreased by 3.5%, the result is 91.

Therefore:

96.5% of x = 91

Converting percentage to decimal: 96.5%=0.965

0.965x = 91

Divide both sides by 0.965

x=94.3

The number is 94.3 (to the nearest tenth)

User Keith Flower
by
7.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.