Add 80/81 and 21/63
80/81 + 21/63 is 107/81.
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,
80/81 = 80 × 7/81 × 7 = 560/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
21/63 = 21 × 9/63 × 9 = 189/567 - Add the two like fractions:
560/567 + 189/567 = 560 + 189/567 = 749/567 - 749/567 simplified gives 107/81
- So, 80/81 + 21/63 = 107/81
In mixed form: 126/81
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