Answers

Add 36/42 and 42/72

36/42 + 42/72 is 121/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 42 × 12 = 504,
   36/42 = 36 × 12/42 × 12 = 432/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   42/72 = 42 × 7/72 × 7 = 294/504
4. Add the two like fractions:
   432/504 + 294/504 = 432 + 294/504 = 726/504
5. 726/504 simplified gives 121/84
6. So, 36/42 + 42/72 = 121/84
   In mixed form: 137/84

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁷²/₄₂+⁴²/₇₂ ³⁶/₄₂+⁸⁴/₇₂ ³⁶/₈₄+⁴²/₇₂

Add Fractions Calculator