Subtract 90/27 from 20/30
1st number: 20/30, 2nd number: 3 9/27
20/30 - 90/27 is -8/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
20/30 = 20 × 9/30 × 9 = 180/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
90/27 = 90 × 10/27 × 10 = 900/270 - Subtract the two like fractions:
180/270 - 900/270 = 180 - 900/270 = -720/270 - After reducing the fraction, the answer is -8/3
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