Answers

Add 8/20 and 45/90

8/20 + 45/90 is 9/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   8/20 = 8 × 9/20 × 9 = 72/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   45/90 = 45 × 2/90 × 2 = 90/180
4. Add the two like fractions:
   72/180 + 90/180 = 72 + 90/180 = 162/180
5. 162/180 simplified gives 9/10
6. So, 8/20 + 45/90 = 9/10

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