Add 21/24 and 45/63
21/24 + 45/63 is 89/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 24 × 21 = 504,
21/24 = 21 × 21/24 × 21 = 441/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
45/63 = 45 × 8/63 × 8 = 360/504 - Add the two like fractions:
441/504 + 360/504 = 441 + 360/504 = 801/504 - 801/504 simplified gives 89/56
- So, 21/24 + 45/63 = 89/56
In mixed form: 133/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+45/63 21/24+90/63 21/48+45/63 63/24+45/63 21/72+45/63