Subtract 70/15 from 10/28, Solve 10/28

Subtract 70/15 from 10/28

1^st number: 10/28, 2^nd number: 4 10/15

10/28 - 70/15 is -181/42.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 28 × 15 = 420,
10/28 = 10 × 15/28 × 15 = 150/420
Likewise, for the 2nd fraction, since 15 × 28 = 420,
70/15 = 70 × 28/15 × 28 = 1960/420
Subtract the two like fractions:
150/420 - 1960/420 = 150 - 1960/420 = -1810/420
After reducing the fraction, the answer is -181/42

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