Answers

Add 20/72 and 56/21

1^st number: 20/72, 2^nd number: 2 14/21

20/72 + 56/21 is 53/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   20/72 = 20 × 7/72 × 7 = 140/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   56/21 = 56 × 24/21 × 24 = 1344/504
4. Add the two like fractions:
   140/504 + 1344/504 = 140 + 1344/504 = 1484/504
5. 1484/504 simplified gives 53/18
6. So, 20/72 + 56/21 = 53/18
   In mixed form: 217/18

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