Answers

Add 42/8 and 81/90

1^st number: 5 2/8, 2^nd number: 81/90

42/8 + 81/90 is 123/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 8 × 45 = 360,
   42/8 = 42 × 45/8 × 45 = 1890/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   81/90 = 81 × 4/90 × 4 = 324/360
4. Add the two like fractions:
   1890/360 + 324/360 = 1890 + 324/360 = 2214/360
5. 2214/360 simplified gives 123/20
6. So, 42/8 + 81/90 = 123/20
   In mixed form: 63/20

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