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Examining Percent Increase and Decrease - One atta Time

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Solve each problem.
It used to take Katie 7 minutes to do 20 multiplication problems. Now she can do the same page in 9.1 minutes. She is now _____ percent faster.
7 8 9 4 5 6 1 2 3 0 . c + ( ) - × : ± x/y x x ÷ ^
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