Add 21/25 and 28/56
21/25 + 28/56 is 67/50.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 56 is 1400
Next, find the equivalent fraction of both fractional numbers with denominator 1400 - For the 1st fraction, since 25 × 56 = 1400,
21/25 = 21 × 56/25 × 56 = 1176/1400 - Likewise, for the 2nd fraction, since 56 × 25 = 1400,
28/56 = 28 × 25/56 × 25 = 700/1400 - Add the two like fractions:
1176/1400 + 700/1400 = 1176 + 700/1400 = 1876/1400 - 1876/1400 simplified gives 67/50
- So, 21/25 + 28/56 = 67/50
In mixed form: 117/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+28/56 21/50+28/56 63/25+28/56 21/25+84/56 21/75+28/56