Subtract 84/90 from 20/60
20/60 - 84/90 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
20/60 = 20 × 3/60 × 3 = 60/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
84/90 = 84 × 2/90 × 2 = 168/180 - Subtract the two like fractions:
60/180 - 168/180 = 60 - 168/180 = -108/180 - After reducing the fraction, the answer is -3/5
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Related: 40/60-84/90