Add 30/40 and 30/81
30/40 + 30/81 is 121/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
30/40 = 30 × 81/40 × 81 = 2430/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
30/81 = 30 × 40/81 × 40 = 1200/3240 - Add the two like fractions:
2430/3240 + 1200/3240 = 2430 + 1200/3240 = 3630/3240 - 3630/3240 simplified gives 121/108
- So, 30/40 + 30/81 = 121/108
In mixed form: 113/108
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