Subtract 3/30 from 81/28
1st number: 2 25/28, 2nd number: 3/30
81/28 - 3/30 is 391/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
3/30 = 3 × 14/30 × 14 = 42/420 - Subtract the two like fractions:
1215/420 - 42/420 = 1215 - 42/420 = 1173/420 - After reducing the fraction, the answer is 391/140
- In mixed form: 2111/140
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