Answers

Add 72/20 and 21/24

1^st number: 3 12/20, 2^nd number: 21/24

72/20 + 21/24 is 179/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 24 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 20 × 6 = 120,
   72/20 = 72 × 6/20 × 6 = 432/120
3. Likewise, for the 2nd fraction, since 24 × 5 = 120,
   21/24 = 21 × 5/24 × 5 = 105/120
4. Add the two like fractions:
   432/120 + 105/120 = 432 + 105/120 = 537/120
5. 537/120 simplified gives 179/40
6. So, 72/20 + 21/24 = 179/40
   In mixed form: 419/40

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