Add 42/4 and 81/42
1st number: 10 2/4, 2nd number: 1 39/42
42/4 + 81/42 is 87/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
42/4 = 42 × 21/4 × 21 = 882/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
81/42 = 81 × 2/42 × 2 = 162/84 - Add the two like fractions:
882/84 + 162/84 = 882 + 162/84 = 1044/84 - 1044/84 simplified gives 87/7
- So, 42/4 + 81/42 = 87/7
In mixed form: 123/7
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