Subtract 20/45 from 5/80
5/80 - 20/45 is -55/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
5/80 = 5 × 9/80 × 9 = 45/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
20/45 = 20 × 16/45 × 16 = 320/720 - Subtract the two like fractions:
45/720 - 320/720 = 45 - 320/720 = -275/720 - After reducing the fraction, the answer is -55/144
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