Subtract 21/81 from 84/30
1st number: 2 24/30, 2nd number: 21/81
84/30 - 21/81 is 343/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
84/30 = 84 × 27/30 × 27 = 2268/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Subtract the two like fractions:
2268/810 - 210/810 = 2268 - 210/810 = 2058/810 - After reducing the fraction, the answer is 343/135
- In mixed form: 273/135
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