Add 30/81 and 15/70
30/81 + 15/70 is 221/378.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 81 × 70 = 5670,
30/81 = 30 × 70/81 × 70 = 2100/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
15/70 = 15 × 81/70 × 81 = 1215/5670 - Add the two like fractions:
2100/5670 + 1215/5670 = 2100 + 1215/5670 = 3315/5670 - 3315/5670 simplified gives 221/378
- So, 30/81 + 15/70 = 221/378
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