Add 21/36 and 80/45
1st number: 21/36, 2nd number: 1 35/45
21/36 + 80/45 is 85/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
80/45 = 80 × 4/45 × 4 = 320/180 - Add the two like fractions:
105/180 + 320/180 = 105 + 320/180 = 425/180 - 425/180 simplified gives 85/36
- So, 21/36 + 80/45 = 85/36
In mixed form: 213/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+80/45 21/72+80/45 21/36+80/90 63/36+80/45