40 - 50% of 80, 45 - 100% of 45, 10 - 50% of 20, 200 - 100% of 200, 20 - 50% of 40, 25 - 100% of 25, 15 - 50% of 30, 55 - 100% of 55, 1 - 50% of 2, 35 - 100% of 35,

Benchmark Percent of a Number Match-up (Mental Math)

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