Subtract 72/90 from 6/80
6/80 - 72/90 is -29/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
6/80 = 6 × 9/80 × 9 = 54/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
72/90 = 72 × 8/90 × 8 = 576/720 - Subtract the two like fractions:
54/720 - 576/720 = 54 - 576/720 = -522/720 - After reducing the fraction, the answer is -29/40
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