Add 81/30 and 42/81
1st number: 2 21/30, 2nd number: 42/81
81/30 + 42/81 is 869/270.
Steps for adding 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,
81/30 = 81 × 27/30 × 27 = 2187/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
42/81 = 42 × 10/81 × 10 = 420/810 - Add the two like fractions:
2187/810 + 420/810 = 2187 + 420/810 = 2607/810 - 2607/810 simplified gives 869/270
- So, 81/30 + 42/81 = 869/270
In mixed form: 359/270
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