Add 21/14 and 81/80
1st number: 1 7/14, 2nd number: 1 1/80
21/14 + 81/80 is 201/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 14 × 40 = 560,
21/14 = 21 × 40/14 × 40 = 840/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Add the two like fractions:
840/560 + 567/560 = 840 + 567/560 = 1407/560 - 1407/560 simplified gives 201/80
- So, 21/14 + 81/80 = 201/80
In mixed form: 241/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+81/80 21/28+81/80 63/14+81/80 21/42+81/80 21/70+81/80 21/98+81/80