Add 1/40 and 21/10
1st number: 1/40, 2nd number: 2 1/10
1/40 + 21/10 is 17/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
1/40 = 1 × 1/40 × 1 = 1/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
21/10 = 21 × 4/10 × 4 = 84/40 - Add the two like fractions:
1/40 + 84/40 = 1 + 84/40 = 85/40 - 85/40 simplified gives 17/8
- So, 1/40 + 21/10 = 17/8
In mixed form: 21/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/40+21/10 1/40+42/10 1/80+21/10 1/40+21/20 3/40+21/10 1/40+63/10 1/40+21/30 5/40+21/10 1/40+21/50 7/40+21/10 1/40+21/70