Add 42/45 and 81/10
1st number: 42/45, 2nd number: 8 1/10
42/45 + 81/10 is 271/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
81/10 = 81 × 9/10 × 9 = 729/90 - Add the two like fractions:
84/90 + 729/90 = 84 + 729/90 = 813/90 - 813/90 simplified gives 271/30
- So, 42/45 + 81/10 = 271/30
In mixed form: 91/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45+81/10 42/90+81/10 42/45+81/20 42/45+81/30 42/45+81/50 42/45+81/70