Add 70/84 and 63/80
70/84 + 63/80 is 389/240.
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,
70/84 = 70 × 20/84 × 20 = 1400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
63/80 = 63 × 21/80 × 21 = 1323/1680 - Add the two like fractions:
1400/1680 + 1323/1680 = 1400 + 1323/1680 = 2723/1680 - 2723/1680 simplified gives 389/240
- So, 70/84 + 63/80 = 389/240
In mixed form: 1149/240
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