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Mademuasel [1]
3 years ago
5

When a number is increased by 7.1%, the result is 89. What is the original number to the nearest tenth?​

Mathematics
1 answer:
balu736 [363]3 years ago
3 0

Answer:

The original number is 83.1

Step-by-step explanation:

Let

x -----> the original number

Remember that

100\%+7.1\%=107.1\%=107.1/100=1.071

The increased number is equal to multiply the original number by the factor 1.071

so

89=1.071x

Solve for x

Divide by 1.071 both sides

x=83.1

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