Subtract 21/40 from 81/35
1st number: 2 11/35, 2nd number: 21/40
81/35 - 21/40 is 501/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
81/35 = 81 × 8/35 × 8 = 648/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Subtract the two like fractions:
648/280 - 147/280 = 648 - 147/280 = 501/280 - In mixed form: 1221/280
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