Add 25/8 and 20/18
1st number: 3 1/8, 2nd number: 1 2/18
25/8 + 20/18 is 305/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
25/8 = 25 × 9/8 × 9 = 225/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
20/18 = 20 × 4/18 × 4 = 80/72 - Add the two like fractions:
225/72 + 80/72 = 225 + 80/72 = 305/72 - So, 25/8 + 20/18 = 305/72
In mixed form: 417/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8+20/18 25/8+40/18 25/16+20/18 25/8+20/36 75/8+20/18 25/8+60/18 25/24+20/18 25/8+20/54 25/40+20/18 25/8+20/90 25/56+20/18