Answers

Add 2/20 and 63/90

2/20 + 63/90 is 4/5.

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,
   2/20 = 2 × 9/20 × 9 = 18/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   63/90 = 63 × 2/90 × 2 = 126/180
4. Add the two like fractions:
   18/180 + 126/180 = 18 + 126/180 = 144/180
5. 144/180 simplified gives 4/5
6. So, 2/20 + 63/90 = 4/5

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