Add 42/20 and 81/30
1st number: 2 2/20, 2nd number: 2 21/30
42/20 + 81/30 is 24/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
81/30 = 81 × 2/30 × 2 = 162/60 - Add the two like fractions:
126/60 + 162/60 = 126 + 162/60 = 288/60 - 288/60 simplified gives 24/5
- So, 42/20 + 81/30 = 24/5
In mixed form: 44/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+81/30 42/40+81/30 42/20+81/60 42/60+81/30 42/20+81/90