Add 18/4 and 45/80
1st number: 4 2/4, 2nd number: 45/80
18/4 + 45/80 is 81/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
18/4 = 18 × 20/4 × 20 = 360/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
45/80 = 45 × 1/80 × 1 = 45/80 - Add the two like fractions:
360/80 + 45/80 = 360 + 45/80 = 405/80 - 405/80 simplified gives 81/16
- So, 18/4 + 45/80 = 81/16
In mixed form: 51/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4+45/80 18/4+90/80 18/8+45/80 54/4+45/80 18/12+45/80 90/4+45/80 18/20+45/80 18/28+45/80