Add 72/20 and 7/16
1st number: 3 12/20, 2nd number: 7/16
72/20 + 7/16 is 323/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 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 16 × 5 = 80,
7/16 = 7 × 5/16 × 5 = 35/80 - Add the two like fractions:
288/80 + 35/80 = 288 + 35/80 = 323/80 - So, 72/20 + 7/16 = 323/80
In mixed form: 43/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+14/16 72/40+7/16 72/20+7/32 72/20+21/16 72/60+7/16 72/20+7/48 72/20+35/16 72/20+7/80 72/20+49/16