Add 18/40 and 6/45
18/40 + 6/45 is 7/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
18/40 = 18 × 9/40 × 9 = 162/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
6/45 = 6 × 8/45 × 8 = 48/360 - Add the two like fractions:
162/360 + 48/360 = 162 + 48/360 = 210/360 - 210/360 simplified gives 7/12
- So, 18/40 + 6/45 = 7/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+6/45 18/40+12/45 18/80+6/45 18/40+6/90 54/40+6/45 18/40+18/45 90/40+6/45 18/40+30/45 18/40+42/45