Add 54/63 and 12/72
54/63 + 12/72 is 43/42.
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,
54/63 = 54 × 8/63 × 8 = 432/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Add the two like fractions:
432/504 + 84/504 = 432 + 84/504 = 516/504 - 516/504 simplified gives 43/42
- So, 54/63 + 12/72 = 43/42
In mixed form: 11/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/63+24/72 54/63+36/72 54/63+60/72 54/63+84/72