Add 28/20 and 70/81
1st number: 1 8/20, 2nd number: 70/81
28/20 + 70/81 is 917/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
28/20 = 28 × 81/20 × 81 = 2268/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
70/81 = 70 × 20/81 × 20 = 1400/1620 - Add the two like fractions:
2268/1620 + 1400/1620 = 2268 + 1400/1620 = 3668/1620 - 3668/1620 simplified gives 917/405
- So, 28/20 + 70/81 = 917/405
In mixed form: 2107/405
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