Add 42/90 and 12/81
42/90 + 12/81 is 83/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 90 × 9 = 810,
42/90 = 42 × 9/90 × 9 = 378/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
12/81 = 12 × 10/81 × 10 = 120/810 - Add the two like fractions:
378/810 + 120/810 = 378 + 120/810 = 498/810 - 498/810 simplified gives 83/135
- So, 42/90 + 12/81 = 83/135
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