Add 21/14 and 9/80
1st number: 1 7/14, 2nd number: 9/80
21/14 + 9/80 is 129/80.
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,
9/80 = 9 × 7/80 × 7 = 63/560 - Add the two like fractions:
840/560 + 63/560 = 840 + 63/560 = 903/560 - 903/560 simplified gives 129/80
- So, 21/14 + 9/80 = 129/80
In mixed form: 149/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+9/80 21/14+18/80 21/28+9/80 63/14+9/80 21/14+27/80 21/42+9/80 21/14+45/80 21/70+9/80 21/14+63/80 21/98+9/80