Add 2/4 and 25/21
1st number: 2/4, 2nd number: 1 4/21
2/4 + 25/21 is 71/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
2/4 = 2 × 21/4 × 21 = 42/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
25/21 = 25 × 4/21 × 4 = 100/84 - Add the two like fractions:
42/84 + 100/84 = 42 + 100/84 = 142/84 - 142/84 simplified gives 71/42
- So, 2/4 + 25/21 = 71/42
In mixed form: 129/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/4+50/21 2/8+25/21 2/4+25/42 6/4+25/21 2/4+75/21 2/12+25/21 2/4+25/63 10/4+25/21 2/20+25/21 14/4+25/21 2/28+25/21