Add 40/84 and 56/72
40/84 + 56/72 is 79/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
40/84 = 40 × 6/84 × 6 = 240/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
56/72 = 56 × 7/72 × 7 = 392/504 - Add the two like fractions:
240/504 + 392/504 = 240 + 392/504 = 632/504 - 632/504 simplified gives 79/63
- So, 40/84 + 56/72 = 79/63
In mixed form: 116/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84+56/72