Add 30/81 and 9/7
1st number: 30/81, 2nd number: 1 2/7
30/81 + 9/7 is 313/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
30/81 = 30 × 7/81 × 7 = 210/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
9/7 = 9 × 81/7 × 81 = 729/567 - Add the two like fractions:
210/567 + 729/567 = 210 + 729/567 = 939/567 - 939/567 simplified gives 313/189
- So, 30/81 + 9/7 = 313/189
In mixed form: 1124/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81+9/7 30/81+18/7 30/81+9/14 90/81+9/7 30/81+27/7 30/81+9/21 30/81+45/7 30/81+9/35 30/81+63/7 30/81+9/49