Add 20/40 and 30/25
1st number: 20/40, 2nd number: 1 5/25
20/40 + 30/25 is 17/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 25 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 40 × 5 = 200,
20/40 = 20 × 5/40 × 5 = 100/200 - Likewise, for the 2nd fraction, since 25 × 8 = 200,
30/25 = 30 × 8/25 × 8 = 240/200 - Add the two like fractions:
100/200 + 240/200 = 100 + 240/200 = 340/200 - 340/200 simplified gives 17/10
- So, 20/40 + 30/25 = 17/10
In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40+60/25 20/80+30/25 20/40+30/50 60/40+30/25 20/40+90/25 20/40+30/75