Add 45/60 and 15/90
45/60 + 15/90 is 11/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
45/60 = 45 × 3/60 × 3 = 135/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
15/90 = 15 × 2/90 × 2 = 30/180 - Add the two like fractions:
135/180 + 30/180 = 135 + 30/180 = 165/180 - 165/180 simplified gives 11/12
- So, 45/60 + 15/90 = 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+15/90 45/60+30/90 45/60+45/90 45/60+75/90