Add 21/14 and 75/80
1st number: 1 7/14, 2nd number: 75/80
21/14 + 75/80 is 39/16.
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,
75/80 = 75 × 7/80 × 7 = 525/560 - Add the two like fractions:
840/560 + 525/560 = 840 + 525/560 = 1365/560 - 1365/560 simplified gives 39/16
- So, 21/14 + 75/80 = 39/16
In mixed form: 27/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+75/80 21/28+75/80 63/14+75/80 21/42+75/80 21/70+75/80 21/98+75/80