Subtract 21/40 from 90/24
1st number: 3 18/24, 2nd number: 21/40
90/24 - 21/40 is 129/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
90/24 = 90 × 5/24 × 5 = 450/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Subtract the two like fractions:
450/120 - 63/120 = 450 - 63/120 = 387/120 - After reducing the fraction, the answer is 129/40
- In mixed form: 39/40
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