Subtract 25/42 from 8/30, Solve 8/30

Subtract 25/42 from 8/30

8/30 - 25/42 is -23/70.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
8/30 = 8 × 7/30 × 7 = 56/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
25/42 = 25 × 5/42 × 5 = 125/210
Subtract the two like fractions:
56/210 - 125/210 = 56 - 125/210 = -69/210
After reducing the fraction, the answer is -23/70

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