Add 20/42 and 3/4
20/42 + 3/4 is 103/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
3/4 = 3 × 21/4 × 21 = 63/84 - Add the two like fractions:
40/84 + 63/84 = 40 + 63/84 = 103/84 - So, 20/42 + 3/4 = 103/84
In mixed form: 119/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+3/4 20/42+6/4 20/84+3/4 20/42+3/8 60/42+3/4 20/42+9/4 20/42+3/12 20/42+15/4 20/42+3/20 20/42+21/4 20/42+3/28