Add 5/10 and 21/40
5/10 + 21/40 is 41/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
5/10 = 5 × 4/10 × 4 = 20/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Add the two like fractions:
20/40 + 21/40 = 20 + 21/40 = 41/40 - So, 5/10 + 21/40 = 41/40
In mixed form: 11/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 5/10+42/40 5/20+21/40 5/10+21/80 15/10+21/40 5/10+63/40 5/30+21/40 25/10+21/40 5/50+21/40 35/10+21/40 5/70+21/40