Add 18/21 and 81/49
1st number: 18/21, 2nd number: 1 32/49
18/21 + 81/49 is 123/49.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
18/21 = 18 × 7/21 × 7 = 126/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
81/49 = 81 × 3/49 × 3 = 243/147 - Add the two like fractions:
126/147 + 243/147 = 126 + 243/147 = 369/147 - 369/147 simplified gives 123/49
- So, 18/21 + 81/49 = 123/49
In mixed form: 225/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+81/49 18/42+81/49 18/21+81/98 54/21+81/49 18/63+81/49 90/21+81/49