Add 8/84 and 81/80
1st number: 8/84, 2nd number: 1 1/80
8/84 + 81/80 is 1861/1680.
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,
8/84 = 8 × 20/84 × 20 = 160/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
81/80 = 81 × 21/80 × 21 = 1701/1680 - Add the two like fractions:
160/1680 + 1701/1680 = 160 + 1701/1680 = 1861/1680 - So, 8/84 + 81/80 = 1861/1680
In mixed form: 1181/1680
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84+81/80 24/84+81/80 40/84+81/80 56/84+81/80