Add 81/20 and 42/30
1st number: 4 1/20, 2nd number: 1 12/30
81/20 + 42/30 is 109/20.
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,
81/20 = 81 × 3/20 × 3 = 243/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
42/30 = 42 × 2/30 × 2 = 84/60 - Add the two like fractions:
243/60 + 84/60 = 243 + 84/60 = 327/60 - 327/60 simplified gives 109/20
- So, 81/20 + 42/30 = 109/20
In mixed form: 59/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20+84/30 81/40+42/30 81/20+42/60 81/60+42/30 81/20+42/90