Subtract 21/12 from 7/70
1st number: 7/70, 2nd number: 1 9/12
7/70 - 21/12 is -33/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
7/70 = 7 × 6/70 × 6 = 42/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420 - Subtract the two like fractions:
42/420 - 735/420 = 42 - 735/420 = -693/420 - After reducing the fraction, the answer is -33/20
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