Add 28/70 and 20/81
28/70 + 20/81 is 262/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
28/70 = 28 × 81/70 × 81 = 2268/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
20/81 = 20 × 70/81 × 70 = 1400/5670 - Add the two like fractions:
2268/5670 + 1400/5670 = 2268 + 1400/5670 = 3668/5670 - 3668/5670 simplified gives 262/405
- So, 28/70 + 20/81 = 262/405
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