Answers

Add 45/63 and 20/90

45/63 + 20/90 is 59/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   45/63 = 45 × 10/63 × 10 = 450/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   20/90 = 20 × 7/90 × 7 = 140/630
4. Add the two like fractions:
   450/630 + 140/630 = 450 + 140/630 = 590/630
5. 590/630 simplified gives 59/63
6. So, 45/63 + 20/90 = 59/63

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