Add 10/40 and 30/18
1st number: 10/40, 2nd number: 1 12/18
10/40 + 30/18 is 23/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
30/18 = 30 × 20/18 × 20 = 600/360 - Add the two like fractions:
90/360 + 600/360 = 90 + 600/360 = 690/360 - 690/360 simplified gives 23/12
- So, 10/40 + 30/18 = 23/12
In mixed form: 111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+30/18 10/40+60/18 10/80+30/18 10/40+30/36 30/40+30/18 10/40+90/18 10/40+30/54 50/40+30/18 10/40+30/90 70/40+30/18