# math

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sonya spent 3/8 of her money and had \$15 left. how much money did she orginally start with?

• math -

If Sonya spend 3/8 of her money, she has (1-3/8)=5/8 left.

Use proportions:
5/8 : \$15
1 : \$x

Use cross multiplication to get:
\$x=\$15*1÷(5/8)
=\$15*(8/5)
=\$24

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