Question

3/3=_/21Fill the blank space with the answer

Answer 1

In the expression 3/3=_/21, it can be observed that 7 is multipled by denominator 3 in order to obtain 21 in in denominator. So same number, 7 is also multiplied with the numerator also.

`(3)/(3)*(7)/(7)=(21)/(21)`

So, 21 is to be filled at blank space.