Subtract 12/7 from 4/30, Solve 4/30

Subtract 12/7 from 4/30

1^st number: 4/30, 2^nd number: 1 5/7

4/30 - 12/7 is -166/105.

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,
4/30 = 4 × 7/30 × 7 = 28/210
Likewise, for the 2nd fraction, since 7 × 30 = 210,
12/7 = 12 × 30/7 × 30 = 360/210
Subtract the two like fractions:
28/210 - 360/210 = 28 - 360/210 = -332/210
After reducing the fraction, the answer is -166/105

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