Add 72/40 and 20/18
1st number: 1 32/40, 2nd number: 1 2/18
72/40 + 20/18 is 131/45.
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,
72/40 = 72 × 9/40 × 9 = 648/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
20/18 = 20 × 20/18 × 20 = 400/360 - Add the two like fractions:
648/360 + 400/360 = 648 + 400/360 = 1048/360 - 1048/360 simplified gives 131/45
- So, 72/40 + 20/18 = 131/45
In mixed form: 241/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+40/18 72/80+20/18 72/40+20/36 72/40+60/18 72/40+20/54 72/40+20/90