Subtract 15/18 from 56/21, Solve 2 14/21

Subtract 15/18 from 56/21

1^st number: 2 14/21, 2^nd number: 15/18

56/21 - 15/18 is 11/6.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 21 × 6 = 126,
56/21 = 56 × 6/21 × 6 = 336/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126
Subtract the two like fractions:
336/126 - 105/126 = 336 - 105/126 = 231/126
After reducing the fraction, the answer is 11/6
In mixed form: 15/6

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