Add 7/81 and 40/20
1st number: 7/81, 2nd number: 2 0/20
7/81 + 40/20 is 169/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
7/81 = 7 × 20/81 × 20 = 140/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
40/20 = 40 × 81/20 × 81 = 3240/1620 - Add the two like fractions:
140/1620 + 3240/1620 = 140 + 3240/1620 = 3380/1620 - 3380/1620 simplified gives 169/81
- So, 7/81 + 40/20 = 169/81
In mixed form: 27/81
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