Add 20/42 and 12/63
20/42 + 12/63 is 2/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
12/63 = 12 × 2/63 × 2 = 24/126 - Add the two like fractions:
60/126 + 24/126 = 60 + 24/126 = 84/126 - 84/126 simplified gives 2/3
- So, 20/42 + 12/63 = 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+12/63 20/42+24/63 20/84+12/63 60/42+12/63 20/42+36/63 20/42+60/63 20/42+84/63