Subtract 80/70 from 21/24
1st number: 21/24, 2nd number: 1 10/70
21/24 - 80/70 is -15/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 70 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 24 × 35 = 840,
21/24 = 21 × 35/24 × 35 = 735/840 - Likewise, for the 2nd fraction, since 70 × 12 = 840,
80/70 = 80 × 12/70 × 12 = 960/840 - Subtract the two like fractions:
735/840 - 960/840 = 735 - 960/840 = -225/840 - After reducing the fraction, the answer is -15/56
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