Add 70/25 and 21/9
1st number: 2 20/25, 2nd number: 2 3/9
70/25 + 21/9 is 77/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 9 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 25 × 9 = 225,
70/25 = 70 × 9/25 × 9 = 630/225 - Likewise, for the 2nd fraction, since 9 × 25 = 225,
21/9 = 21 × 25/9 × 25 = 525/225 - Add the two like fractions:
630/225 + 525/225 = 630 + 525/225 = 1155/225 - 1155/225 simplified gives 77/15
- So, 70/25 + 21/9 = 77/15
In mixed form: 52/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/25+42/9 70/50+21/9 70/25+21/18 70/25+63/9 70/75+21/9 70/25+21/27 70/25+21/45 70/25+21/63