Answers

Subtract 42/90 from 25/42

25/42 - 42/90 is 9/70.

Steps for subtracting 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,
   42/90 = 42 × 7/90 × 7 = 294/630
4. Subtract the two like fractions:
   375/630 - 294/630 = 375 - 294/630 = 81/630
5. After reducing the fraction, the answer is 9/70

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