Subtract 70/30 from 56/28, Solve 2 0/28

Subtract 70/30 from 56/28

1^st number: 2 0/28, 2^nd number: 2 10/30

56/28 - 70/30 is -1/3.

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

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 28 × 15 = 420,
56/28 = 56 × 15/28 × 15 = 840/420
Likewise, for the 2nd fraction, since 30 × 14 = 420,
70/30 = 70 × 14/30 × 14 = 980/420
Subtract the two like fractions:
840/420 - 980/420 = 840 - 980/420 = -140/420
After reducing the fraction, the answer is -1/3

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