Answers

Subtract 90/42 from 20/25

1^st number: 20/25, 2^nd number: 2 6/42

20/25 - 90/42 is -47/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 42 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 25 × 42 = 1050,
   20/25 = 20 × 42/25 × 42 = 840/1050
3. Likewise, for the 2nd fraction, since 42 × 25 = 1050,
   90/42 = 90 × 25/42 × 25 = 2250/1050
4. Subtract the two like fractions:
   840/1050 - 2250/1050 = 840 - 2250/1050 = -1410/1050
5. After reducing the fraction, the answer is -47/35

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