Subtract 10/28 from 4/30, Solve 4/30

Subtract 10/28 from 4/30

4/30 - 10/28 is -47/210.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 30 × 14 = 420,
4/30 = 4 × 14/30 × 14 = 56/420
Likewise, for the 2nd fraction, since 28 × 15 = 420,
10/28 = 10 × 15/28 × 15 = 150/420
Subtract the two like fractions:
56/420 - 150/420 = 56 - 150/420 = -94/420
After reducing the fraction, the answer is -47/210

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