Add 81/84 and 70/80
81/84 + 70/80 is 103/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
81/84 = 81 × 20/84 × 20 = 1620/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
70/80 = 70 × 21/80 × 21 = 1470/1680 - Add the two like fractions:
1620/1680 + 1470/1680 = 1620 + 1470/1680 = 3090/1680 - 3090/1680 simplified gives 103/56
- So, 81/84 + 70/80 = 103/56
In mixed form: 147/56
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