Add 81/30 and 20/70
1st number: 2 21/30, 2nd number: 20/70
81/30 + 20/70 is 209/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
20/70 = 20 × 3/70 × 3 = 60/210 - Add the two like fractions:
567/210 + 60/210 = 567 + 60/210 = 627/210 - 627/210 simplified gives 209/70
- So, 81/30 + 20/70 = 209/70
In mixed form: 269/70
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