Subtract 70/18 from 81/24
1st number: 3 9/24, 2nd number: 3 16/18
81/24 - 70/18 is -37/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 24 × 3 = 72,
81/24 = 81 × 3/24 × 3 = 243/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
70/18 = 70 × 4/18 × 4 = 280/72 - Subtract the two like fractions:
243/72 - 280/72 = 243 - 280/72 = -37/72
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