Add 42/63 and 3/12
42/63 + 3/12 is 11/12.
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,
42/63 = 42 × 4/63 × 4 = 168/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
3/12 = 3 × 21/12 × 21 = 63/252 - Add the two like fractions:
168/252 + 63/252 = 168 + 63/252 = 231/252 - 231/252 simplified gives 11/12
- So, 42/63 + 3/12 = 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+3/12 42/63+6/12 42/63+3/24 42/63+9/12 42/63+3/36 42/63+15/12 42/63+3/60 42/63+21/12 42/63+3/84