Add 21/20 and 3/81
1st number: 1 1/20, 2nd number: 3/81
21/20 + 3/81 is 587/540.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
21/20 = 21 × 81/20 × 81 = 1701/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
3/81 = 3 × 20/81 × 20 = 60/1620 - Add the two like fractions:
1701/1620 + 60/1620 = 1701 + 60/1620 = 1761/1620 - 1761/1620 simplified gives 587/540
- So, 21/20 + 3/81 = 587/540
In mixed form: 147/540
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