63 × 2/7 = 18
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(1/9) x (2/7) = (1x2) / (9x7) = 2/63
63/9 = 7
They are: 3/7 and 2/9 are the equivalent 27/63 and 14/63
(18/63)*(25/10)*(36/100) = (2/7)*(5/2)*(9/25) = (5/7)*(9/25) = (1/7)*(9/5) = 9/35
2/7 of 63 means 2/7 x 63. Multiply 2 x 63, then divide the result by 7. You may also divide 63 / 7 first, then multiply by 2 - in this case it is simpler, because it is divisible, and results in smaller numbers for the intermediate calculations.