Question

250 gram of fish coast rupees 45 .A man purchase fish of weight 1.2 kg . How much the man have to pay for the fish.

Answer 1

1.2 kg = 1200 grams 
250 grams = 45 rupees
1 g = 45 / 250
1200 g = 45/ 250 * 1200
ans = 216 rupees

Answer 2

1.2 kg will costs 216 rupees