Add 4/5 and 5/20
4/5 + 5/20 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
4/5 = 4 × 4/5 × 4 = 16/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
5/20 = 5 × 1/20 × 1 = 5/20 - Add the two like fractions:
16/20 + 5/20 = 16 + 5/20 = 21/20 - So, 4/5 + 5/20 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5+5/20 4/5+10/20 4/10+5/20 4/5+5/40 12/5+5/20 4/5+15/20 4/15+5/20 4/5+5/60 20/5+5/20 4/5+25/20 4/25+5/20 28/5+5/20 4/5+35/20 4/35+5/20