Add 81/10 and 30/21
1st number: 8 1/10, 2nd number: 1 9/21
81/10 + 30/21 is 667/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
81/10 = 81 × 21/10 × 21 = 1701/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
30/21 = 30 × 10/21 × 10 = 300/210 - Add the two like fractions:
1701/210 + 300/210 = 1701 + 300/210 = 2001/210 - 2001/210 simplified gives 667/70
- So, 81/10 + 30/21 = 667/70
In mixed form: 937/70
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