Add 72/20 and 42/60
1st number: 3 12/20, 2nd number: 42/60
72/20 + 42/60 is 43/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
72/20 = 72 × 3/20 × 3 = 216/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
42/60 = 42 × 1/60 × 1 = 42/60 - Add the two like fractions:
216/60 + 42/60 = 216 + 42/60 = 258/60 - 258/60 simplified gives 43/10
- So, 72/20 + 42/60 = 43/10
In mixed form: 43/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+84/60 72/40+42/60 72/60+42/60