72: 36 =2: 1 ratio =2

Two fifths: 9=2:45 ratio =2/45

Thirty-five Secondary Eight: Twenty Secondary Ten = 12:25 Ratio = 12/25.

0.25:50= 1:200 ratio = 1/200

Solution ratio

X: three quarters = 12: one eighth.

x=( 12*3/4)/( 1/8)

=72

One quarter: x= two thirds: one sixth.

x=( 1/4* 1/6)/(2/3)

= 1/ 16