Question

a number when decreased by 20% becomes 688. find the number.​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

In context to question asked,

We have to determine the value of number.

It is given that,

A number when decreased by 20% becomes 688

Let the number be x

So, from above we can write it mathematically,

When number when decreased by 20%, then the new number will be (100% -20%) = 80% of original number.

So, new number will be $80\%\:of\:x = \frac{80}{100}\times 100 = 0.8 x$

So, from above,

We have,

$0.8x = 688\\=>x = \frac{688}{0.8}\\=>x = 860$

Hence, the value of number will be 860.