Add 25/80 and 21/28
25/80 + 21/28 is 17/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
25/80 = 25 × 7/80 × 7 = 175/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
21/28 = 21 × 20/28 × 20 = 420/560 - Add the two like fractions:
175/560 + 420/560 = 175 + 420/560 = 595/560 - 595/560 simplified gives 17/16
- So, 25/80 + 21/28 = 17/16
In mixed form: 11/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/80+21/28 25/80+42/28 25/80+21/56 75/80+21/28 25/80+63/28 25/80+21/84