Add 72/40 and 15/30
1st number: 1 32/40, 2nd number: 15/30
72/40 + 15/30 is 23/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
72/40 = 72 × 3/40 × 3 = 216/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
15/30 = 15 × 4/30 × 4 = 60/120 - Add the two like fractions:
216/120 + 60/120 = 216 + 60/120 = 276/120 - 276/120 simplified gives 23/10
- So, 72/40 + 15/30 = 23/10
In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+15/30 72/40+15/60 72/40+45/30 72/40+15/90 72/40+75/30