Add 3/4 and 20/42
3/4 + 20/42 is 103/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
3/4 = 3 × 21/4 × 21 = 63/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Add the two like fractions:
63/84 + 40/84 = 63 + 40/84 = 103/84 - So, 3/4 + 20/42 = 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: 6/4+20/42 3/4+40/42 3/8+20/42 3/4+20/84 9/4+20/42 3/4+60/42 3/12+20/42 15/4+20/42 3/20+20/42 21/4+20/42 3/28+20/42