Add 18/20 and 9/63
18/20 + 9/63 is 73/70.
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,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
9/63 = 9 × 20/63 × 20 = 180/1260 - Add the two like fractions:
1134/1260 + 180/1260 = 1134 + 180/1260 = 1314/1260 - 1314/1260 simplified gives 73/70
- So, 18/20 + 9/63 = 73/70
In mixed form: 13/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+9/63 18/20+18/63 18/40+9/63 54/20+9/63 18/20+27/63 18/60+9/63 90/20+9/63 18/20+45/63