Answers

Add 40/21 and 20/72

1^st number: 1 19/21, 2^nd number: 20/72

40/21 + 20/72 is 275/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 21 × 24 = 504,
   40/21 = 40 × 24/21 × 24 = 960/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   20/72 = 20 × 7/72 × 7 = 140/504
4. Add the two like fractions:
   960/504 + 140/504 = 960 + 140/504 = 1100/504
5. 1100/504 simplified gives 275/126
6. So, 40/21 + 20/72 = 275/126
   In mixed form: 223/126

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