Add 25/8 and 18/20
1st number: 3 1/8, 2nd number: 18/20
25/8 + 18/20 is 161/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
25/8 = 25 × 5/8 × 5 = 125/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
18/20 = 18 × 2/20 × 2 = 36/40 - Add the two like fractions:
125/40 + 36/40 = 125 + 36/40 = 161/40 - So, 25/8 + 18/20 = 161/40
In mixed form: 41/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8+18/20 25/8+36/20 25/16+18/20 25/8+18/40 75/8+18/20 25/8+54/20 25/24+18/20 25/8+18/60 25/8+90/20 25/40+18/20 25/56+18/20