Subtract 81/9 from 28/20
1st number: 1 8/20, 2nd number: 9 0/9
28/20 - 81/9 is -38/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
28/20 = 28 × 9/20 × 9 = 252/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
81/9 = 81 × 20/9 × 20 = 1620/180 - Subtract the two like fractions:
252/180 - 1620/180 = 252 - 1620/180 = -1368/180 - After reducing the fraction, the answer is -38/5
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