Subtract 15/45 from 30/28, Solve 1 2/28

Subtract 15/45 from 30/28

1^st number: 1 2/28, 2^nd number: 15/45

30/28 - 15/45 is 31/42.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 28 × 45 = 1260,
30/28 = 30 × 45/28 × 45 = 1350/1260
Likewise, for the 2nd fraction, since 45 × 28 = 1260,
15/45 = 15 × 28/45 × 28 = 420/1260
Subtract the two like fractions:
1350/1260 - 420/1260 = 1350 - 420/1260 = 930/1260
After reducing the fraction, the answer is 31/42

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