Add 2/21 and 63/45
1st number: 2/21, 2nd number: 1 18/45
2/21 + 63/45 is 157/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
2/21 = 2 × 15/21 × 15 = 30/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
63/45 = 63 × 7/45 × 7 = 441/315 - Add the two like fractions:
30/315 + 441/315 = 30 + 441/315 = 471/315 - 471/315 simplified gives 157/105
- So, 2/21 + 63/45 = 157/105
In mixed form: 152/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+63/45 2/42+63/45 2/21+63/90 6/21+63/45 2/63+63/45 10/21+63/45 14/21+63/45