Subtract 81/30 from 8/14, Solve 8/14

Subtract 81/30 from 8/14

1^st number: 8/14, 2^nd number: 2 21/30

8/14 - 81/30 is -149/70.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 14 × 15 = 210,
8/14 = 8 × 15/14 × 15 = 120/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210
Subtract the two like fractions:
120/210 - 567/210 = 120 - 567/210 = -447/210
After reducing the fraction, the answer is -149/70

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