Add 42/21 and 75/63
1st number: 2 0/21, 2nd number: 1 12/63
42/21 + 75/63 is 67/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
42/21 = 42 × 3/21 × 3 = 126/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
75/63 = 75 × 1/63 × 1 = 75/63 - Add the two like fractions:
126/63 + 75/63 = 126 + 75/63 = 201/63 - 201/63 simplified gives 67/21
- So, 42/21 + 75/63 = 67/21
In mixed form: 34/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+75/63 42/63+75/63