Subtract 42/7 from 21/35
1st number: 21/35, 2nd number: 6 0/7
21/35 - 42/7 is -27/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 35 × 1 = 35,
21/35 = 21 × 1/35 × 1 = 21/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
42/7 = 42 × 5/7 × 5 = 210/35 - Subtract the two like fractions:
21/35 - 210/35 = 21 - 210/35 = -189/35 - After reducing the fraction, the answer is -27/5
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