Add 81/10 and 42/30
1st number: 8 1/10, 2nd number: 1 12/30
81/10 + 42/30 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
81/10 = 81 × 3/10 × 3 = 243/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Add the two like fractions:
243/30 + 42/30 = 243 + 42/30 = 285/30 - 285/30 simplified gives 19/2
- So, 81/10 + 42/30 = 19/2
In mixed form: 91/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10+84/30 81/20+42/30 81/10+42/60 81/30+42/30 81/10+42/90 81/50+42/30 81/70+42/30