Answers

Add 90/20 and 8/42

1^st number: 4 10/20, 2^nd number: 8/42

90/20 + 8/42 is 197/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   90/20 = 90 × 21/20 × 21 = 1890/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   8/42 = 8 × 10/42 × 10 = 80/420
4. Add the two like fractions:
   1890/420 + 80/420 = 1890 + 80/420 = 1970/420
5. 1970/420 simplified gives 197/42
6. So, 90/20 + 8/42 = 197/42
   In mixed form: 429/42

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