Add 72/40 and 12/5
1st number: 1 32/40, 2nd number: 2 2/5
72/40 + 12/5 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
72/40 = 72 × 1/40 × 1 = 72/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
12/5 = 12 × 8/5 × 8 = 96/40 - Add the two like fractions:
72/40 + 96/40 = 72 + 96/40 = 168/40 - 168/40 simplified gives 21/5
- So, 72/40 + 12/5 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+24/5 72/80+12/5 72/40+12/10 72/40+36/5 72/40+12/15 72/40+60/5 72/40+12/25 72/40+84/5 72/40+12/35