Subtract 28/40 from 1/18
1/18 - 28/40 is -29/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
1/18 = 1 × 20/18 × 20 = 20/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Subtract the two like fractions:
20/360 - 252/360 = 20 - 252/360 = -232/360 - After reducing the fraction, the answer is -29/45
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