Add 21/63 and 24/20
1st number: 21/63, 2nd number: 1 4/20
21/63 + 24/20 is 23/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
21/63 = 21 × 20/63 × 20 = 420/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
24/20 = 24 × 63/20 × 63 = 1512/1260 - Add the two like fractions:
420/1260 + 1512/1260 = 420 + 1512/1260 = 1932/1260 - 1932/1260 simplified gives 23/15
- So, 21/63 + 24/20 = 23/15
In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+24/20 21/63+48/20 21/63+24/40 21/63+72/20 21/63+24/60