Add 7/81 and 42/30
1st number: 7/81, 2nd number: 1 12/30
7/81 + 42/30 is 602/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
7/81 = 7 × 10/81 × 10 = 70/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
42/30 = 42 × 27/30 × 27 = 1134/810 - Add the two like fractions:
70/810 + 1134/810 = 70 + 1134/810 = 1204/810 - 1204/810 simplified gives 602/405
- So, 7/81 + 42/30 = 602/405
In mixed form: 1197/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/81+42/30 7/81+84/30 7/81+42/60 21/81+42/30 7/81+42/90 35/81+42/30 49/81+42/30