# maths

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When Sandy decreased her savings by 75% and Gene increased hers by 40%, they would save \$280 each. What were their total savings at first?

• maths -

100%-75%:\$280
or
25%:280
100%:?
Cross multiply
Original saving=100%*\$280/25%=\$1120

Similarly for Gene,
100%+40% : \$280
or
140% : 280
100% : ?
Cross multiply
Original for Gene = 100%*\$280/140=\$200

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