Add 21/25 and 5/90
21/25 + 5/90 is 403/450.
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,
5/90 = 5 × 5/90 × 5 = 25/450 - Add the two like fractions:
378/450 + 25/450 = 378 + 25/450 = 403/450 - So, 21/25 + 5/90 = 403/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+5/90 21/25+10/90 21/50+5/90 63/25+5/90 21/25+15/90 21/75+5/90 21/25+25/90 21/25+35/90