Add 20/81 and 42/63
20/81 + 42/63 is 74/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 63 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
20/81 = 20 × 7/81 × 7 = 140/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
42/63 = 42 × 9/63 × 9 = 378/567 - Add the two like fractions:
140/567 + 378/567 = 140 + 378/567 = 518/567 - 518/567 simplified gives 74/81
- So, 20/81 + 42/63 = 74/81
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