Add 40/20 and 4/81
1st number: 2 0/20, 2nd number: 4/81
40/20 + 4/81 is 166/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
40/20 = 40 × 81/20 × 81 = 3240/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
4/81 = 4 × 20/81 × 20 = 80/1620 - Add the two like fractions:
3240/1620 + 80/1620 = 3240 + 80/1620 = 3320/1620 - 3320/1620 simplified gives 166/81
- So, 40/20 + 4/81 = 166/81
In mixed form: 24/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+4/81 40/20+8/81 40/20+12/81 40/60+4/81 40/20+20/81 40/20+28/81