Add 81/21 and 42/10
1st number: 3 18/21, 2nd number: 4 2/10
81/21 + 42/10 is 282/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
81/21 = 81 × 10/21 × 10 = 810/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
42/10 = 42 × 21/10 × 21 = 882/210 - Add the two like fractions:
810/210 + 882/210 = 810 + 882/210 = 1692/210 - 1692/210 simplified gives 282/35
- So, 81/21 + 42/10 = 282/35
In mixed form: 82/35
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