Subtract 70/18 from 70/72
1st number: 70/72, 2nd number: 3 16/18
70/72 - 70/18 is -35/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
70/72 = 70 × 1/72 × 1 = 70/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
70/18 = 70 × 4/18 × 4 = 280/72 - Subtract the two like fractions:
70/72 - 280/72 = 70 - 280/72 = -210/72 - After reducing the fraction, the answer is -35/12
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