Add 20/63 and 63/81
20/63 + 63/81 is 23/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
20/63 = 20 × 9/63 × 9 = 180/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
63/81 = 63 × 7/81 × 7 = 441/567 - Add the two like fractions:
180/567 + 441/567 = 180 + 441/567 = 621/567 - 621/567 simplified gives 23/21
- So, 20/63 + 63/81 = 23/21
In mixed form: 12/21
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