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13 October, 18:04

Four friends each flipped a coin different numbers of times.

Alice got heads 75% of the time.

Mary got heads 8 out of 10 times.

Sarah got heads 17 out of 20 times.

Ellen got heads ⅗ of the time.

Who had the greatest percentage? How do you know?

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  1. 13 October, 18:28
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    Find a common denominator between 75/100, 8/10, 17/20, 3/5. If you use a common denominator of 100, you'll get: 75/100, 80/100, 85/100, 60/100. Now you can compare.
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