Add 32/20 and 21/81
1st number: 1 12/20, 2nd number: 21/81
32/20 + 21/81 is 251/135.
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,
32/20 = 32 × 81/20 × 81 = 2592/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
21/81 = 21 × 20/81 × 20 = 420/1620 - Add the two like fractions:
2592/1620 + 420/1620 = 2592 + 420/1620 = 3012/1620 - 3012/1620 simplified gives 251/135
- So, 32/20 + 21/81 = 251/135
In mixed form: 1116/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/20+21/81 32/20+42/81 32/40+21/81 96/20+21/81 32/20+63/81 32/60+21/81