Add 12/28 and 30/63
12/28 + 30/63 is 19/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
12/28 = 12 × 9/28 × 9 = 108/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
30/63 = 30 × 4/63 × 4 = 120/252 - Add the two like fractions:
108/252 + 120/252 = 108 + 120/252 = 228/252 - 228/252 simplified gives 19/21
- So, 12/28 + 30/63 = 19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28+30/63 12/28+60/63 12/56+30/63 36/28+30/63 12/28+90/63 12/84+30/63 60/28+30/63 84/28+30/63