Subtract 21/14 from 9/40
1st number: 9/40, 2nd number: 1 7/14
9/40 - 21/14 is -51/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 14 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280 - Likewise, for the 2nd fraction, since 14 × 20 = 280,
21/14 = 21 × 20/14 × 20 = 420/280 - Subtract the two like fractions:
63/280 - 420/280 = 63 - 420/280 = -357/280 - After reducing the fraction, the answer is -51/40
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