Add 45/12 and 36/80
1st number: 3 9/12, 2nd number: 36/80
45/12 + 36/80 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
45/12 = 45 × 20/12 × 20 = 900/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
36/80 = 36 × 3/80 × 3 = 108/240 - Add the two like fractions:
900/240 + 108/240 = 900 + 108/240 = 1008/240 - 1008/240 simplified gives 21/5
- So, 45/12 + 36/80 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+36/80 45/12+72/80 45/24+36/80 45/36+36/80 45/60+36/80 45/84+36/80