Add 72/40 and 12/18
1st number: 1 32/40, 2nd number: 12/18
72/40 + 12/18 is 37/15.
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,
12/18 = 12 × 20/18 × 20 = 240/360 - Add the two like fractions:
648/360 + 240/360 = 648 + 240/360 = 888/360 - 888/360 simplified gives 37/15
- So, 72/40 + 12/18 = 37/15
In mixed form: 27/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+24/18 72/80+12/18 72/40+12/36 72/40+36/18 72/40+12/54 72/40+60/18 72/40+12/90 72/40+84/18