Add 81/7 and 42/63
1st number: 11 4/7, 2nd number: 42/63
81/7 + 42/63 is 257/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
81/7 = 81 × 9/7 × 9 = 729/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
42/63 = 42 × 1/63 × 1 = 42/63 - Add the two like fractions:
729/63 + 42/63 = 729 + 42/63 = 771/63 - 771/63 simplified gives 257/21
- So, 81/7 + 42/63 = 257/21
In mixed form: 125/21
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