Subtract 49/40 from 18/72
1st number: 18/72, 2nd number: 1 9/40
18/72 - 49/40 is -39/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
49/40 = 49 × 9/40 × 9 = 441/360 - Subtract the two like fractions:
90/360 - 441/360 = 90 - 441/360 = -351/360 - After reducing the fraction, the answer is -39/40
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