Add 18/21 and 10/49
18/21 + 10/49 is 52/49.
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,
10/49 = 10 × 3/49 × 3 = 30/147 - Add the two like fractions:
126/147 + 30/147 = 126 + 30/147 = 156/147 - 156/147 simplified gives 52/49
- So, 18/21 + 10/49 = 52/49
In mixed form: 13/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+10/49 18/21+20/49 18/42+10/49 18/21+10/98 54/21+10/49 18/21+30/49 18/63+10/49 90/21+10/49 18/21+50/49 18/21+70/49