Subtract 81/4 from 28/30
1st number: 28/30, 2nd number: 20 1/4
28/30 - 81/4 is -1159/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
81/4 = 81 × 15/4 × 15 = 1215/60 - Subtract the two like fractions:
56/60 - 1215/60 = 56 - 1215/60 = -1159/60
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