Add 45/21 and 42/4
1st number: 2 3/21, 2nd number: 10 2/4
45/21 + 42/4 is 177/14.
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,
45/21 = 45 × 4/21 × 4 = 180/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
42/4 = 42 × 21/4 × 21 = 882/84 - Add the two like fractions:
180/84 + 882/84 = 180 + 882/84 = 1062/84 - 1062/84 simplified gives 177/14
- So, 45/21 + 42/4 = 177/14
In mixed form: 129/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+42/4 45/21+84/4 45/42+42/4 45/21+42/8 45/63+42/4 45/21+42/12 45/21+42/20 45/21+42/28