Add 21/25 and 24/90
21/25 + 24/90 is 83/75.
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,
24/90 = 24 × 5/90 × 5 = 120/450 - Add the two like fractions:
378/450 + 120/450 = 378 + 120/450 = 498/450 - 498/450 simplified gives 83/75
- So, 21/25 + 24/90 = 83/75
In mixed form: 18/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+24/90 21/25+48/90 21/50+24/90 63/25+24/90 21/25+72/90 21/75+24/90