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Nataly_w [17]
3 years ago
15

When a number is increased by 9%, the result is 99. What is the original number to the nearest tenth?

Mathematics
1 answer:
Naya [18.7K]3 years ago
5 0

Answer:

The original number is 90.8

Step-by-step explanation:

we know that

100\%+9\%=109\%=109/100=1.09

Let

x -----> the original number

The original number multiplied by 1.09 must be equal to 99

so

1.09x=99

Solve the linear equation for x

Divide by 1.09 both sides

x=99/1.09

x=90.8

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Step-by-step explanation:

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