Subtract 15/18 from 40/14, Solve 2 12/14

Subtract 15/18 from 40/14

1^st number: 2 12/14, 2^nd number: 15/18

40/14 - 15/18 is 85/42.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
40/14 = 40 × 9/14 × 9 = 360/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126
Subtract the two like fractions:
360/126 - 105/126 = 360 - 105/126 = 255/126
After reducing the fraction, the answer is 85/42
In mixed form: 21/42

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