Question

Express minus81by135 as a rational no with (1)denominator 15(2)numerator 27

Answer 1

Solution :

Given ( - 81 /135 )

i ) -81/135

= ( -9 × 9 )/( 9 × 15 )

= -9/15

ii ) -81/135

= ( - 3 × 3 × 9 )/( 3 × 3 × 15 )

= - 27/45

••••

Answer 2

The given fraction is:

$\frac{-81}{135}$

To express it with denominator 15, divide the numerator and denominator by 9

= $\frac{\frac{-81}{9} }{\frac{135}{9} }$

Answer(1) = $\frac{-9}{15}$

To express it with numerator 27, divide the number by -3

= $\frac{\frac{-81}{-3} }{\frac{135}{-3} }$

Answer(2) = $\frac{27}{-45}$