Add 20/21 and 6/80
20/21 + 6/80 is 863/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
20/21 = 20 × 80/21 × 80 = 1600/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
6/80 = 6 × 21/80 × 21 = 126/1680 - Add the two like fractions:
1600/1680 + 126/1680 = 1600 + 126/1680 = 1726/1680 - 1726/1680 simplified gives 863/840
- So, 20/21 + 6/80 = 863/840
In mixed form: 123/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+6/80 20/21+12/80 20/42+6/80 60/21+6/80 20/21+18/80 20/63+6/80 20/21+30/80 20/21+42/80