Subtract 21/8 from 36/40
1st number: 36/40, 2nd number: 2 5/8
36/40 - 21/8 is -69/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
36/40 = 36 × 1/40 × 1 = 36/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
21/8 = 21 × 5/8 × 5 = 105/40 - Subtract the two like fractions:
36/40 - 105/40 = 36 - 105/40 = -69/40
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