Add 18/63 and 18/20
18/63 + 18/20 is 83/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
18/63 = 18 × 20/63 × 20 = 360/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Add the two like fractions:
360/1260 + 1134/1260 = 360 + 1134/1260 = 1494/1260 - 1494/1260 simplified gives 83/70
- So, 18/63 + 18/20 = 83/70
In mixed form: 113/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63+18/20 18/63+36/20 18/63+18/40 54/63+18/20 18/63+54/20 18/63+18/60 90/63+18/20 18/63+90/20