Add 42/72 and 3/42
42/72 + 3/42 is 55/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
42/72 = 42 × 7/72 × 7 = 294/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
3/42 = 3 × 12/42 × 12 = 36/504 - Add the two like fractions:
294/504 + 36/504 = 294 + 36/504 = 330/504 - 330/504 simplified gives 55/84
- So, 42/72 + 3/42 = 55/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+3/42 42/72+6/42 42/72+3/84 42/72+9/42 42/72+15/42 42/72+21/42