Subtract 45/28 from 42/30
1st number: 1 12/30, 2nd number: 1 17/28
42/30 - 45/28 is -29/140.
Steps for subtracting fractions
- 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,
42/30 = 42 × 14/30 × 14 = 588/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
45/28 = 45 × 15/28 × 15 = 675/420 - Subtract the two like fractions:
588/420 - 675/420 = 588 - 675/420 = -87/420 - After reducing the fraction, the answer is -29/140
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