Add 42/81 and 25/7
1st number: 42/81, 2nd number: 3 4/7
42/81 + 25/7 is 773/189.
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,
42/81 = 42 × 7/81 × 7 = 294/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
25/7 = 25 × 81/7 × 81 = 2025/567 - Add the two like fractions:
294/567 + 2025/567 = 294 + 2025/567 = 2319/567 - 2319/567 simplified gives 773/189
- So, 42/81 + 25/7 = 773/189
In mixed form: 417/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81+25/7 42/81+50/7 42/81+25/14 42/81+75/7 42/81+25/21 42/81+25/35 42/81+25/49