Subtract 21/8 from 15/70
1st number: 15/70, 2nd number: 2 5/8
15/70 - 21/8 is -135/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 8 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
15/70 = 15 × 4/70 × 4 = 60/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
21/8 = 21 × 35/8 × 35 = 735/280 - Subtract the two like fractions:
60/280 - 735/280 = 60 - 735/280 = -675/280 - After reducing the fraction, the answer is -135/56
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