Add 72/20 and 15/80
1st number: 3 12/20, 2nd number: 15/80
72/20 + 15/80 is 303/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
72/20 = 72 × 4/20 × 4 = 288/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
15/80 = 15 × 1/80 × 1 = 15/80 - Add the two like fractions:
288/80 + 15/80 = 288 + 15/80 = 303/80 - So, 72/20 + 15/80 = 303/80
In mixed form: 363/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+30/80 72/40+15/80 72/20+45/80 72/60+15/80 72/20+75/80