Add 21/2 and 63/40
1st number: 10 1/2, 2nd number: 1 23/40
21/2 + 63/40 is 483/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
21/2 = 21 × 20/2 × 20 = 420/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
63/40 = 63 × 1/40 × 1 = 63/40 - Add the two like fractions:
420/40 + 63/40 = 420 + 63/40 = 483/40 - So, 21/2 + 63/40 = 483/40
In mixed form: 123/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+63/40 21/4+63/40 21/2+63/80 63/2+63/40 21/6+63/40 21/10+63/40 21/14+63/40