Question

write the decimal expression of the following rational numbers without actual division 21/25​

Answer 1

Answer:

Without actual division, we may find the decimal expansion of 21/25 -

First, we look denominator and try to make it 10, 100, 1000 or 10000 and so on {depend on denominator}.

Here(21/25) we have 25 as the denominator.

We can make it 100 if we multiply it by 4.

Lets discuss -

(21×4)/(25×4) {multiplying by 4 in numerator and denominator}

(84)/(100)

0.84

Our decimal expansion is 0.84