Add 25/21 and 3/81
1st number: 1 4/21, 2nd number: 3/81
25/21 + 3/81 is 232/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
25/21 = 25 × 27/21 × 27 = 675/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
3/81 = 3 × 7/81 × 7 = 21/567 - Add the two like fractions:
675/567 + 21/567 = 675 + 21/567 = 696/567 - 696/567 simplified gives 232/189
- So, 25/21 + 3/81 = 232/189
In mixed form: 143/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+3/81 25/21+6/81 25/42+3/81 75/21+3/81 25/21+9/81 25/63+3/81 25/21+15/81 25/21+21/81