Add 28/25 and 21/90
1st number: 1 3/25, 2nd number: 21/90
28/25 + 21/90 is 203/150.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
28/25 = 28 × 18/25 × 18 = 504/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Add the two like fractions:
504/450 + 105/450 = 504 + 105/450 = 609/450 - 609/450 simplified gives 203/150
- So, 28/25 + 21/90 = 203/150
In mixed form: 153/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/25+21/90 28/25+42/90 28/50+21/90 84/25+21/90 28/25+63/90 28/75+21/90