Subtract 21/14 from 42/70
1st number: 42/70, 2nd number: 1 7/14
42/70 - 21/14 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 14 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Likewise, for the 2nd fraction, since 14 × 5 = 70,
21/14 = 21 × 5/14 × 5 = 105/70 - Subtract the two like fractions:
42/70 - 105/70 = 42 - 105/70 = -63/70 - After reducing the fraction, the answer is -9/10
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