Add 42/21 and 75/4
1st number: 2 0/21, 2nd number: 18 3/4
42/21 + 75/4 is 83/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
75/4 = 75 × 21/4 × 21 = 1575/84 - Add the two like fractions:
168/84 + 1575/84 = 168 + 1575/84 = 1743/84 - 1743/84 simplified gives 83/4
- So, 42/21 + 75/4 = 83/4
In mixed form: 203/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+75/4 42/21+75/8 42/63+75/4 42/21+75/12 42/21+75/20 42/21+75/28