Add 7/81 and 42/20
1st number: 7/81, 2nd number: 2 2/20
7/81 + 42/20 is 1771/810.
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,
42/20 = 42 × 81/20 × 81 = 3402/1620 - Add the two like fractions:
140/1620 + 3402/1620 = 140 + 3402/1620 = 3542/1620 - 3542/1620 simplified gives 1771/810
- So, 7/81 + 42/20 = 1771/810
In mixed form: 2151/810
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