Subtract 18/28 from 45/80
45/80 - 18/28 is -9/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
45/80 = 45 × 7/80 × 7 = 315/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
18/28 = 18 × 20/28 × 20 = 360/560 - Subtract the two like fractions:
315/560 - 360/560 = 315 - 360/560 = -45/560 - After reducing the fraction, the answer is -9/112
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