Subtract 90/24 from 70/20
1st number: 3 10/20, 2nd number: 3 18/24
70/20 - 90/24 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
70/20 = 70 × 6/20 × 6 = 420/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
90/24 = 90 × 5/24 × 5 = 450/120 - Subtract the two like fractions:
420/120 - 450/120 = 420 - 450/120 = -30/120 - After reducing the fraction, the answer is -1/4
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