Add 21/48 and 84/45
1st number: 21/48, 2nd number: 1 39/45
21/48 + 84/45 is 553/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 48 × 15 = 720,
21/48 = 21 × 15/48 × 15 = 315/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
84/45 = 84 × 16/45 × 16 = 1344/720 - Add the two like fractions:
315/720 + 1344/720 = 315 + 1344/720 = 1659/720 - 1659/720 simplified gives 553/240
- So, 21/48 + 84/45 = 553/240
In mixed form: 273/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48+84/45 21/96+84/45 21/48+84/90 63/48+84/45