Question

if the numerator and denominator of a rational number are increased by 4 and 2 respectively then the resultant number is 5???7. if the numerator and denominator both are decreased by 3 each the denominator becomes twice of the numerator. what is the value of the denominator

Answer 1

"Numerator be x  

Let the denominator will be x+8

⇒x+17/x+8-1=3/2

⇒x+17/x+7=3/2

⇒2(x+17)=3(x+7)  

⇒2x+34=3x+21

⇒34-21=3x-2x    

⇒13=x  

∴x/x+8

=13/21

There were two numbers involved such as top number and bottom number. Two numbers are called as numerator and a denominator.

They both represent different things and the simplest way to define the numerator and a denominator.

Numerator is top number of a fraction and Denominator is bottom number of a fraction.

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