Add 45/18 and 12/80
1st number: 2 9/18, 2nd number: 12/80
45/18 + 12/80 is 53/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
45/18 = 45 × 40/18 × 40 = 1800/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
12/80 = 12 × 9/80 × 9 = 108/720 - Add the two like fractions:
1800/720 + 108/720 = 1800 + 108/720 = 1908/720 - 1908/720 simplified gives 53/20
- So, 45/18 + 12/80 = 53/20
In mixed form: 213/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+12/80 45/18+24/80 45/36+12/80 45/18+36/80 45/54+12/80 45/18+60/80 45/90+12/80 45/18+84/80