Subtract 7/8 from 18/45
18/45 - 7/8 is -19/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
18/45 = 18 × 8/45 × 8 = 144/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
7/8 = 7 × 45/8 × 45 = 315/360 - Subtract the two like fractions:
144/360 - 315/360 = 144 - 315/360 = -171/360 - After reducing the fraction, the answer is -19/40
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