Subtract 90/6 from 21/40
1st number: 21/40, 2nd number: 15 0/6
21/40 - 90/6 is -579/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 6 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Likewise, for the 2nd fraction, since 6 × 20 = 120,
90/6 = 90 × 20/6 × 20 = 1800/120 - Subtract the two like fractions:
63/120 - 1800/120 = 63 - 1800/120 = -1737/120 - After reducing the fraction, the answer is -579/40
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