Question

Money off coupons have been circulated to 300 households. Only 2/5 of these were redeemed(used) in the local supermarket to get a free shampoo. What fraction of coupons were unused?

Answer 1

3/5, because if you added the 2/5 to the 3/5 it would be 5/5 or all the coupons totaled. So if 2/5 were used, 3/5 were unused