Answers

Subtract 8/20 from 90/42

1^st number: 2 6/42, 2^nd number: 8/20

90/42 - 8/20 is 61/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   90/42 = 90 × 10/42 × 10 = 900/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   8/20 = 8 × 21/20 × 21 = 168/420
4. Subtract the two like fractions:
   900/420 - 168/420 = 900 - 168/420 = 732/420
5. After reducing the fraction, the answer is 61/35
6. In mixed form: 126/35

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