if x : y is 1 : 2 and y : z is 2 : 5 then x : z is equal to
"the two ratios given are having the same number 2 for y in both the ratios . hence - x : y = 1 : 2 y : z = 2 : 5 = > x : z = 1 : 5 answer c"
divide(1, 5)