Add 21/50 and 50/90
21/50 + 50/90 is 439/450.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
21/50 = 21 × 9/50 × 9 = 189/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
50/90 = 50 × 5/90 × 5 = 250/450 - Add the two like fractions:
189/450 + 250/450 = 189 + 250/450 = 439/450 - So, 21/50 + 50/90 = 439/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50+50/90 63/50+50/90