Subtract 28/72 from 40/14, Solve 2 12/14

Subtract 28/72 from 40/14

1^st number: 2 12/14, 2^nd number: 28/72

40/14 - 28/72 is 311/126.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 14 × 36 = 504,
40/14 = 40 × 36/14 × 36 = 1440/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
28/72 = 28 × 7/72 × 7 = 196/504
Subtract the two like fractions:
1440/504 - 196/504 = 1440 - 196/504 = 1244/504
After reducing the fraction, the answer is 311/126
In mixed form: 259/126

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