Add 5/84 and 7/80
5/84 + 7/80 is 247/1680.
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,
5/84 = 5 × 20/84 × 20 = 100/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
7/80 = 7 × 21/80 × 21 = 147/1680 - Add the two like fractions:
100/1680 + 147/1680 = 100 + 147/1680 = 247/1680 - So, 5/84 + 7/80 = 247/1680
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/84+7/80 5/84+14/80 15/84+7/80 5/84+21/80 25/84+7/80 5/84+35/80 35/84+7/80 5/84+49/80