Subtract 81/12 from 12/70
1st number: 12/70, 2nd number: 6 9/12
12/70 - 81/12 is -921/140.
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,
12/70 = 12 × 6/70 × 6 = 72/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
81/12 = 81 × 35/12 × 35 = 2835/420 - Subtract the two like fractions:
72/420 - 2835/420 = 72 - 2835/420 = -2763/420 - After reducing the fraction, the answer is -921/140
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