Add 30/63 and 4/12
30/63 + 4/12 is 17/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
30/63 = 30 × 4/63 × 4 = 120/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
4/12 = 4 × 21/12 × 21 = 84/252 - Add the two like fractions:
120/252 + 84/252 = 120 + 84/252 = 204/252 - 204/252 simplified gives 17/21
- So, 30/63 + 4/12 = 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63+4/12 30/63+8/12 30/63+4/24 90/63+4/12 30/63+4/36 30/63+20/12 30/63+4/60 30/63+28/12 30/63+4/84