Subtract 6/40 from 81/15
1st number: 5 6/15, 2nd number: 6/40
81/15 - 6/40 is 21/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
81/15 = 81 × 8/15 × 8 = 648/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
6/40 = 6 × 3/40 × 3 = 18/120 - Subtract the two like fractions:
648/120 - 18/120 = 648 - 18/120 = 630/120 - After reducing the fraction, the answer is 21/4
- In mixed form: 51/4
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