Add 45/20 and 80/45
1st number: 2 5/20, 2nd number: 1 35/45
45/20 + 80/45 is 145/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
45/20 = 45 × 9/20 × 9 = 405/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
80/45 = 80 × 4/45 × 4 = 320/180 - Add the two like fractions:
405/180 + 320/180 = 405 + 320/180 = 725/180 - 725/180 simplified gives 145/36
- So, 45/20 + 80/45 = 145/36
In mixed form: 41/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+80/45 45/40+80/45 45/20+80/90 45/60+80/45