Add 21/20 and 20/25
1st number: 1 1/20, 2nd number: 20/25
21/20 + 20/25 is 37/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
21/20 = 21 × 5/20 × 5 = 105/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
20/25 = 20 × 4/25 × 4 = 80/100 - Add the two like fractions:
105/100 + 80/100 = 105 + 80/100 = 185/100 - 185/100 simplified gives 37/20
- So, 21/20 + 20/25 = 37/20
In mixed form: 117/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+20/25 21/20+40/25 21/40+20/25 21/20+20/50 63/20+20/25 21/20+60/25 21/60+20/25 21/20+20/75