Add 42/21 and 25/18
1st number: 2 0/21, 2nd number: 1 7/18
42/21 + 25/18 is 61/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
42/21 = 42 × 6/21 × 6 = 252/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
25/18 = 25 × 7/18 × 7 = 175/126 - Add the two like fractions:
252/126 + 175/126 = 252 + 175/126 = 427/126 - 427/126 simplified gives 61/18
- So, 42/21 + 25/18 = 61/18
In mixed form: 37/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+25/18 42/21+50/18 42/21+25/36 42/21+75/18 42/63+25/18 42/21+25/54 42/21+25/90