Question

The cost of 20 oranges is Rs
90 Find the cost of 8 oranges

Answer 1

cost of 20 oranges = 90
cost of 1 orange = 90/20
cost of 8 oranges = 90 x 8/20 = 36

Answer 2

cost of 20 oranges = 90 rs
cost of 1 orange= 90/20=4.5
cost of 8 oranges =8×4.5=36

hope it helps:)