Add 5/21 and 1/80
5/21 + 1/80 is 421/1680.
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,
5/21 = 5 × 80/21 × 80 = 400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
1/80 = 1 × 21/80 × 21 = 21/1680 - Add the two like fractions:
400/1680 + 21/1680 = 400 + 21/1680 = 421/1680 - So, 5/21 + 1/80 = 421/1680
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+1/80 5/21+2/80 5/42+1/80 15/21+1/80 5/21+3/80 5/63+1/80 25/21+1/80 5/21+5/80 35/21+1/80 5/21+7/80