Add 18/20 and 56/63
18/20 + 56/63 is 161/90.
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,
56/63 = 56 × 20/63 × 20 = 1120/1260 - Add the two like fractions:
1134/1260 + 1120/1260 = 1134 + 1120/1260 = 2254/1260 - 2254/1260 simplified gives 161/90
- So, 18/20 + 56/63 = 161/90
In mixed form: 171/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+56/63 18/40+56/63 54/20+56/63 18/60+56/63 90/20+56/63