Subtract 40/21 from 50/18, Solve 2 14/18

Subtract 40/21 from 50/18

1^st number: 2 14/18, 2^nd number: 1 19/21

50/18 - 40/21 is 55/63.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
50/18 = 50 × 7/18 × 7 = 350/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
40/21 = 40 × 6/21 × 6 = 240/126
Subtract the two like fractions:
350/126 - 240/126 = 350 - 240/126 = 110/126
After reducing the fraction, the answer is 55/63

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