Subtract 21/28 from 7/35
7/35 - 21/28 is -11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
7/35 = 7 × 4/35 × 4 = 28/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Subtract the two like fractions:
28/140 - 105/140 = 28 - 105/140 = -77/140 - After reducing the fraction, the answer is -11/20
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