Subtract 45/28 from 20/30
1st number: 20/30, 2nd number: 1 17/28
20/30 - 45/28 is -79/84.
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,
20/30 = 20 × 14/30 × 14 = 280/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
45/28 = 45 × 15/28 × 15 = 675/420 - Subtract the two like fractions:
280/420 - 675/420 = 280 - 675/420 = -395/420 - After reducing the fraction, the answer is -79/84
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