Add 28/25 and 21/63
1st number: 1 3/25, 2nd number: 21/63
28/25 + 21/63 is 109/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 63 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575 - For the 1st fraction, since 25 × 63 = 1575,
28/25 = 28 × 63/25 × 63 = 1764/1575 - Likewise, for the 2nd fraction, since 63 × 25 = 1575,
21/63 = 21 × 25/63 × 25 = 525/1575 - Add the two like fractions:
1764/1575 + 525/1575 = 1764 + 525/1575 = 2289/1575 - 2289/1575 simplified gives 109/75
- So, 28/25 + 21/63 = 109/75
In mixed form: 134/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/25+21/63 28/25+42/63 28/50+21/63 84/25+21/63 28/75+21/63