Subtract 28/7 from 49/20
1st number: 2 9/20, 2nd number: 4 0/7
49/20 - 28/7 is -31/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
49/20 = 49 × 7/20 × 7 = 343/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
28/7 = 28 × 20/7 × 20 = 560/140 - Subtract the two like fractions:
343/140 - 560/140 = 343 - 560/140 = -217/140 - After reducing the fraction, the answer is -31/20
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