Answers

Add 42/7 and 45/20

1^st number: 6 0/7, 2^nd number: 2 5/20

42/7 + 45/20 is 33/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 7 × 20 = 140,
   42/7 = 42 × 20/7 × 20 = 840/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   45/20 = 45 × 7/20 × 7 = 315/140
4. Add the two like fractions:
   840/140 + 315/140 = 840 + 315/140 = 1155/140
5. 1155/140 simplified gives 33/4
6. So, 42/7 + 45/20 = 33/4
   In mixed form: 81/4

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