Add 21/4 and 25/72
1st number: 5 1/4, 2nd number: 25/72
21/4 + 25/72 is 403/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 4 × 18 = 72,
21/4 = 21 × 18/4 × 18 = 378/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
25/72 = 25 × 1/72 × 1 = 25/72 - Add the two like fractions:
378/72 + 25/72 = 378 + 25/72 = 403/72 - So, 21/4 + 25/72 = 403/72
In mixed form: 543/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+25/72 21/4+50/72 21/8+25/72 63/4+25/72 21/4+75/72 21/12+25/72 21/20+25/72 21/28+25/72