Subtract 72/49 from 81/20
1st number: 4 1/20, 2nd number: 1 23/49
81/20 - 72/49 is 2529/980.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 49 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
81/20 = 81 × 49/20 × 49 = 3969/980 - Likewise, for the 2nd fraction, since 49 × 20 = 980,
72/49 = 72 × 20/49 × 20 = 1440/980 - Subtract the two like fractions:
3969/980 - 1440/980 = 3969 - 1440/980 = 2529/980 - In mixed form: 2569/980
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