Subtract 81/20 from 5/45
1st number: 5/45, 2nd number: 4 1/20
5/45 - 81/20 is -709/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
5/45 = 5 × 4/45 × 4 = 20/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Subtract the two like fractions:
20/180 - 729/180 = 20 - 729/180 = -709/180
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