Answers

Add 45/42 and 60/72

1^st number: 1 3/42, 2^nd number: 60/72

45/42 + 60/72 is 40/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 42 × 12 = 504,
   45/42 = 45 × 12/42 × 12 = 540/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   60/72 = 60 × 7/72 × 7 = 420/504
4. Add the two like fractions:
   540/504 + 420/504 = 540 + 420/504 = 960/504
5. 960/504 simplified gives 40/21
6. So, 45/42 + 60/72 = 40/21
   In mixed form: 119/21

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