Add 54/81 and 30/40
54/81 + 30/40 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
54/81 = 54 × 40/81 × 40 = 2160/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
30/40 = 30 × 81/40 × 81 = 2430/3240 - Add the two like fractions:
2160/3240 + 2430/3240 = 2160 + 2430/3240 = 4590/3240 - 4590/3240 simplified gives 17/12
- So, 54/81 + 30/40 = 17/12
In mixed form: 15/12
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