Add 21/25 and 4/45
21/25 + 4/45 is 209/225.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 25 × 9 = 225,
21/25 = 21 × 9/25 × 9 = 189/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
4/45 = 4 × 5/45 × 5 = 20/225 - Add the two like fractions:
189/225 + 20/225 = 189 + 20/225 = 209/225 - So, 21/25 + 4/45 = 209/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+4/45 21/25+8/45 21/50+4/45 21/25+4/90 63/25+4/45 21/25+12/45 21/75+4/45 21/25+20/45 21/25+28/45