Add 72/40 and 42/18
1st number: 1 32/40, 2nd number: 2 6/18
72/40 + 42/18 is 62/15.
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,
42/18 = 42 × 20/18 × 20 = 840/360 - Add the two like fractions:
648/360 + 840/360 = 648 + 840/360 = 1488/360 - 1488/360 simplified gives 62/15
- So, 72/40 + 42/18 = 62/15
In mixed form: 42/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+84/18 72/80+42/18 72/40+42/36 72/40+42/54 72/40+42/90