Subtract 21/8 from 40/20
1st number: 2 0/20, 2nd number: 2 5/8
40/20 - 21/8 is -5/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
40/20 = 40 × 2/20 × 2 = 80/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
21/8 = 21 × 5/8 × 5 = 105/40 - Subtract the two like fractions:
80/40 - 105/40 = 80 - 105/40 = -25/40 - After reducing the fraction, the answer is -5/8
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