Add 42/84 and 7/4
1st number: 42/84, 2nd number: 1 3/4
42/84 + 7/4 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
7/4 = 7 × 21/4 × 21 = 147/84 - Add the two like fractions:
42/84 + 147/84 = 42 + 147/84 = 189/84 - 189/84 simplified gives 9/4
- So, 42/84 + 7/4 = 9/4
In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+14/4 42/84+7/8 42/84+21/4 42/84+7/12 42/84+35/4 42/84+7/20 42/84+49/4 42/84+7/28