If 2 and 8 / 21 divided by M = 2 and 1 / 2, then m * 7 / 20=____

If 2 and 8 / 21 divided by M = 2 and 1 / 2, then m * 7 / 20=____ 1/3
m=[2+8/21]/[2+1/2]=20/21

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