Add 25/81 and 42/7
1st number: 25/81, 2nd number: 6 0/7
25/81 + 42/7 is 511/81.
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,
25/81 = 25 × 7/81 × 7 = 175/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
42/7 = 42 × 81/7 × 81 = 3402/567 - Add the two like fractions:
175/567 + 3402/567 = 175 + 3402/567 = 3577/567 - 3577/567 simplified gives 511/81
- So, 25/81 + 42/7 = 511/81
In mixed form: 625/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/81+42/7 25/81+84/7 25/81+42/14 75/81+42/7 25/81+42/21 25/81+42/35 25/81+42/49