Add 70/18 and 63/20
1st number: 3 16/18, 2nd number: 3 3/20
70/18 + 63/20 is 1267/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
70/18 = 70 × 10/18 × 10 = 700/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
63/20 = 63 × 9/20 × 9 = 567/180 - Add the two like fractions:
700/180 + 567/180 = 700 + 567/180 = 1267/180 - So, 70/18 + 63/20 = 1267/180
In mixed form: 77/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36+63/20 70/18+63/40 70/54+63/20 70/18+63/60 70/90+63/20