Add 21/25 and 18/90
21/25 + 18/90 is 26/25.
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,
21/25 = 21 × 18/25 × 18 = 378/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
18/90 = 18 × 5/90 × 5 = 90/450 - Add the two like fractions:
378/450 + 90/450 = 378 + 90/450 = 468/450 - 468/450 simplified gives 26/25
- So, 21/25 + 18/90 = 26/25
In mixed form: 11/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+18/90 21/25+36/90 21/50+18/90 63/25+18/90 21/25+54/90 21/75+18/90