Subtract 42/7 from 1/30, Solve 1/30

Subtract 42/7 from 1/30

1^st number: 1/30, 2^nd number: 6 0/7

1/30 - 42/7 is -179/30.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210
Likewise, for the 2nd fraction, since 7 × 30 = 210,
42/7 = 42 × 30/7 × 30 = 1260/210
Subtract the two like fractions:
7/210 - 1260/210 = 7 - 1260/210 = -1253/210
After reducing the fraction, the answer is -179/30

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