So, $12 is 5/8 of 4/5 of his allowance.

(5/8)(4/5)a = 12

(20/40)a = 12

2(1/2)a = 12(2)

a = 24

(1/5)24 = 4.8

(3/8)(24 - 4.8) = (3/8)(19.2) = 7.2

The book was $4.80 and the pen was $7.20.

Petal J.

asked • 10/07/18Jerry spent 1/5 of his allowance on a book and 3/8 of the remainder of his allowance for a pen. Jerry remained with $12.00 Calculate a. Jerry's allowance, b. the cost of the book, c) the cost of the pen

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So, $12 is 5/8 of 4/5 of his allowance.

(5/8)(4/5)a = 12

(20/40)a = 12

2(1/2)a = 12(2)

a = 24

(1/5)24 = 4.8

(3/8)(24 - 4.8) = (3/8)(19.2) = 7.2

The book was $4.80 and the pen was $7.20.

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