Subtract 21/18 from 49/72
1st number: 49/72, 2nd number: 1 3/18
49/72 - 21/18 is -35/72.
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,
49/72 = 49 × 1/72 × 1 = 49/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
21/18 = 21 × 4/18 × 4 = 84/72 - Subtract the two like fractions:
49/72 - 84/72 = 49 - 84/72 = -35/72
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