Add 20/42 and 32/21
1st number: 20/42, 2nd number: 1 11/21
20/42 + 32/21 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
32/21 = 32 × 2/21 × 2 = 64/42 - Add the two like fractions:
20/42 + 64/42 = 20 + 64/42 = 84/42 - 84/42 simplified gives 2/1
- So, 20/42 + 32/21 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+32/21 20/42+64/21 20/84+32/21 20/42+32/42 60/42+32/21 20/42+96/21 20/42+32/63