Add 20/84 and 98/80
1st number: 20/84, 2nd number: 1 18/80
20/84 + 98/80 is 1229/840.
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,
20/84 = 20 × 20/84 × 20 = 400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
98/80 = 98 × 21/80 × 21 = 2058/1680 - Add the two like fractions:
400/1680 + 2058/1680 = 400 + 2058/1680 = 2458/1680 - 2458/1680 simplified gives 1229/840
- So, 20/84 + 98/80 = 1229/840
In mixed form: 1389/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+98/80 60/84+98/80