Subtract 30/81 from 90/28
1st number: 3 6/28, 2nd number: 30/81
90/28 - 30/81 is 1075/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
90/28 = 90 × 81/28 × 81 = 7290/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
30/81 = 30 × 28/81 × 28 = 840/2268 - Subtract the two like fractions:
7290/2268 - 840/2268 = 7290 - 840/2268 = 6450/2268 - After reducing the fraction, the answer is 1075/378
- In mixed form: 2319/378
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