Add 5/7 and 42/72
5/7 + 42/72 is 109/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 7 × 72 = 504,
5/7 = 5 × 72/7 × 72 = 360/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
42/72 = 42 × 7/72 × 7 = 294/504 - Add the two like fractions:
360/504 + 294/504 = 360 + 294/504 = 654/504 - 654/504 simplified gives 109/84
- So, 5/7 + 42/72 = 109/84
In mixed form: 125/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+42/72 5/7+84/72 5/14+42/72 15/7+42/72 5/21+42/72 25/7+42/72 5/35+42/72 35/7+42/72 5/49+42/72