Add 21/2 and 2/40
1st number: 10 1/2, 2nd number: 2/40
21/2 + 2/40 is 211/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
21/2 = 21 × 20/2 × 20 = 420/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
2/40 = 2 × 1/40 × 1 = 2/40 - Add the two like fractions:
420/40 + 2/40 = 420 + 2/40 = 422/40 - 422/40 simplified gives 211/20
- So, 21/2 + 2/40 = 211/20
In mixed form: 1011/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+2/40 21/2+4/40 21/4+2/40 21/2+2/80 63/2+2/40 21/2+6/40 21/6+2/40 21/2+10/40 21/10+2/40 21/2+14/40 21/14+2/40