Answers

Add 25/42 and 4/90

25/42 + 4/90 is 403/630.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   25/42 = 25 × 15/42 × 15 = 375/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   4/90 = 4 × 7/90 × 7 = 28/630
4. Add the two like fractions:
   375/630 + 28/630 = 375 + 28/630 = 403/630
5. So, 25/42 + 4/90 = 403/630

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