Add 21/25 and 5/7
21/25 + 5/7 is 272/175.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175
Next, find the equivalent fraction of both fractional numbers with denominator 175 - For the 1st fraction, since 25 × 7 = 175,
21/25 = 21 × 7/25 × 7 = 147/175 - Likewise, for the 2nd fraction, since 7 × 25 = 175,
5/7 = 5 × 25/7 × 25 = 125/175 - Add the two like fractions:
147/175 + 125/175 = 147 + 125/175 = 272/175 - So, 21/25 + 5/7 = 272/175
In mixed form: 197/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+5/7 21/25+10/7 21/50+5/7 21/25+5/14 63/25+5/7 21/25+15/7 21/75+5/7 21/25+5/21 21/25+25/7 21/25+5/35 21/25+35/7 21/25+5/49