Add 81/5 and 40/20
1st number: 16 1/5, 2nd number: 2 0/20
81/5 + 40/20 is 91/5.
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,
81/5 = 81 × 4/5 × 4 = 324/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
40/20 = 40 × 1/20 × 1 = 40/20 - Add the two like fractions:
324/20 + 40/20 = 324 + 40/20 = 364/20 - 364/20 simplified gives 91/5
- So, 81/5 + 40/20 = 91/5
In mixed form: 181/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5+80/20 81/10+40/20 81/15+40/20 81/5+40/60 81/25+40/20 81/35+40/20