Add 40/21 and 5/20
1st number: 1 19/21, 2nd number: 5/20
40/21 + 5/20 is 181/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
40/21 = 40 × 20/21 × 20 = 800/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Add the two like fractions:
800/420 + 105/420 = 800 + 105/420 = 905/420 - 905/420 simplified gives 181/84
- So, 40/21 + 5/20 = 181/84
In mixed form: 213/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+5/20 40/21+10/20 40/42+5/20 40/21+5/40 40/21+15/20 40/63+5/20 40/21+5/60 40/21+25/20 40/21+35/20