Add 3/21 and 75/63
1st number: 3/21, 2nd number: 1 12/63
3/21 + 75/63 is 4/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
3/21 = 3 × 3/21 × 3 = 9/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
75/63 = 75 × 1/63 × 1 = 75/63 - Add the two like fractions:
9/63 + 75/63 = 9 + 75/63 = 84/63 - 84/63 simplified gives 4/3
- So, 3/21 + 75/63 = 4/3
In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+75/63 3/42+75/63 9/21+75/63 3/63+75/63 15/21+75/63