Answers

Add 15/21 and 72/60

1^st number: 15/21, 2^nd number: 1 12/60

15/21 + 72/60 is 67/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   15/21 = 15 × 20/21 × 20 = 300/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   72/60 = 72 × 7/60 × 7 = 504/420
4. Add the two like fractions:
   300/420 + 504/420 = 300 + 504/420 = 804/420
5. 804/420 simplified gives 67/35
6. So, 15/21 + 72/60 = 67/35
   In mixed form: 132/35

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