Add 21/30 and 63/24
1st number: 21/30, 2nd number: 2 15/24
21/30 + 63/24 is 133/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
63/24 = 63 × 5/24 × 5 = 315/120 - Add the two like fractions:
84/120 + 315/120 = 84 + 315/120 = 399/120 - 399/120 simplified gives 133/40
- So, 21/30 + 63/24 = 133/40
In mixed form: 313/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+63/24 21/60+63/24 21/30+63/48 63/30+63/24 21/90+63/24 21/30+63/72