Subtract 70/21 from 14/30, Solve 14/30

Subtract 70/21 from 14/30

1^st number: 14/30, 2^nd number: 3 7/21

14/30 - 70/21 is -43/15.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
14/30 = 14 × 7/30 × 7 = 98/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210
Subtract the two like fractions:
98/210 - 700/210 = 98 - 700/210 = -602/210
After reducing the fraction, the answer is -43/15

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