Add 12/20 and 18/63
12/20 + 18/63 is 31/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
12/20 = 12 × 63/20 × 63 = 756/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
18/63 = 18 × 20/63 × 20 = 360/1260 - Add the two like fractions:
756/1260 + 360/1260 = 756 + 360/1260 = 1116/1260 - 1116/1260 simplified gives 31/35
- So, 12/20 + 18/63 = 31/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+18/63 12/20+36/63 12/40+18/63 36/20+18/63 12/20+54/63 12/60+18/63 60/20+18/63 12/20+90/63 84/20+18/63