Subtract 14/7 from 30/72, Solve 30/72

Subtract 14/7 from 30/72

1^st number: 30/72, 2^nd number: 2 0/7

30/72 - 14/7 is -19/12.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
14/7 = 14 × 72/7 × 72 = 1008/504
Subtract the two like fractions:
210/504 - 1008/504 = 210 - 1008/504 = -798/504
After reducing the fraction, the answer is -19/12

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