Add 28/10 and 81/42
1st number: 2 8/10, 2nd number: 1 39/42
28/10 + 81/42 is 331/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
28/10 = 28 × 21/10 × 21 = 588/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
81/42 = 81 × 5/42 × 5 = 405/210 - Add the two like fractions:
588/210 + 405/210 = 588 + 405/210 = 993/210 - 993/210 simplified gives 331/70
- So, 28/10 + 81/42 = 331/70
In mixed form: 451/70
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