Add 18/8 and 25/20
1st number: 2 2/8, 2nd number: 1 5/20
18/8 + 25/20 is 7/2.
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,
18/8 = 18 × 5/8 × 5 = 90/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
25/20 = 25 × 2/20 × 2 = 50/40 - Add the two like fractions:
90/40 + 50/40 = 90 + 50/40 = 140/40 - 140/40 simplified gives 7/2
- So, 18/8 + 25/20 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+25/20 18/8+50/20 18/16+25/20 18/8+25/40 54/8+25/20 18/8+75/20 18/24+25/20 18/8+25/60 90/8+25/20 18/40+25/20 18/56+25/20