Add 21/63 and 75/20
1st number: 21/63, 2nd number: 3 15/20
21/63 + 75/20 is 49/12.
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,
75/20 = 75 × 63/20 × 63 = 4725/1260 - Add the two like fractions:
420/1260 + 4725/1260 = 420 + 4725/1260 = 5145/1260 - 5145/1260 simplified gives 49/12
- So, 21/63 + 75/20 = 49/12
In mixed form: 41/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+75/20 21/63+75/40 21/63+75/60