Add 45/50 and 20/90
45/50 + 20/90 is 101/90.
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,
45/50 = 45 × 9/50 × 9 = 405/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
20/90 = 20 × 5/90 × 5 = 100/450 - Add the two like fractions:
405/450 + 100/450 = 405 + 100/450 = 505/450 - 505/450 simplified gives 101/90
- So, 45/50 + 20/90 = 101/90
In mixed form: 111/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50+20/90 45/50+40/90 45/50+60/90