Add 1/18 and 45/40
1st number: 1/18, 2nd number: 1 5/40
1/18 + 45/40 is 85/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
1/18 = 1 × 20/18 × 20 = 20/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Add the two like fractions:
20/360 + 405/360 = 20 + 405/360 = 425/360 - 425/360 simplified gives 85/72
- So, 1/18 + 45/40 = 85/72
In mixed form: 113/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/18+45/40 1/18+90/40 1/36+45/40 1/18+45/80 3/18+45/40 1/54+45/40 5/18+45/40 1/90+45/40 7/18+45/40