Add 20/63 and 70/72
20/63 + 70/72 is 325/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
20/63 = 20 × 8/63 × 8 = 160/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504 - Add the two like fractions:
160/504 + 490/504 = 160 + 490/504 = 650/504 - 650/504 simplified gives 325/252
- So, 20/63 + 70/72 = 325/252
In mixed form: 173/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63+70/72 60/63+70/72