Answers

Add 40/84 and 81/72

1^st number: 40/84, 2^nd number: 1 9/72

40/84 + 81/72 is 269/168.

Steps for adding fractions

1. 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
2. For the 1st fraction, since 84 × 6 = 504,
   40/84 = 40 × 6/84 × 6 = 240/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   81/72 = 81 × 7/72 × 7 = 567/504
4. Add the two like fractions:
   240/504 + 567/504 = 240 + 567/504 = 807/504
5. 807/504 simplified gives 269/168
6. So, 40/84 + 81/72 = 269/168
   In mixed form: 1101/168

MathStep (Works offline)

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

Related: ⁸⁰/₈₄+⁸¹/₇₂

Add Fractions Calculator