Add 81/21 and 3/70
1st number: 3 18/21, 2nd number: 3/70
81/21 + 3/70 is 39/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 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 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Add the two like fractions:
810/210 + 9/210 = 810 + 9/210 = 819/210 - 819/210 simplified gives 39/10
- So, 81/21 + 3/70 = 39/10
In mixed form: 39/10
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