Subtract 72/35 from 30/28, Solve 1 2/28

Subtract 72/35 from 30/28

1^st number: 1 2/28, 2^nd number: 2 2/35

30/28 - 72/35 is -69/70.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 35 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140
Likewise, for the 2nd fraction, since 35 × 4 = 140,
72/35 = 72 × 4/35 × 4 = 288/140
Subtract the two like fractions:
150/140 - 288/140 = 150 - 288/140 = -138/140
After reducing the fraction, the answer is -69/70

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