Answers

Add 42/45 and 27/20

1^st number: 42/45, 2^nd number: 1 7/20

42/45 + 27/20 is 137/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 45 × 4 = 180,
   42/45 = 42 × 4/45 × 4 = 168/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   27/20 = 27 × 9/20 × 9 = 243/180
4. Add the two like fractions:
   168/180 + 243/180 = 168 + 243/180 = 411/180
5. 411/180 simplified gives 137/60
6. So, 42/45 + 27/20 = 137/60
   In mixed form: 217/60

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