The total cost of his purchase is $9.95
Bill has a $10 coupon
He needs to buy 25 balloons
Each balloons cost $1.99
The first step is to divide the coupon amount which is $10 by the cost of the balloon which is $1.99
10/1.99
= 5
The next step is to multiply 5 by the cost of the balloon which is $1.99
5× 1.99
= 9.95
Hence the total cost of his purchase is $9.95
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