Subtract 18/80 from 6/90
6/90 - 18/80 is -19/120.
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,
6/90 = 6 × 8/90 × 8 = 48/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
18/80 = 18 × 9/80 × 9 = 162/720 - Subtract the two like fractions:
48/720 - 162/720 = 48 - 162/720 = -114/720 - After reducing the fraction, the answer is -19/120
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