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Find the value of x. give reasons to justify your solutions! l, m ∈ kn

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? (ps: write how you got the answer)

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.