Subtract 72/80 from 27/90
27/90 - 72/80 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
27/90 = 27 × 8/90 × 8 = 216/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
72/80 = 72 × 9/80 × 9 = 648/720 - Subtract the two like fractions:
216/720 - 648/720 = 216 - 648/720 = -432/720 - After reducing the fraction, the answer is -3/5
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