Answers

Subtract 42/10 from 18/25

1^st number: 18/25, 2^nd number: 4 2/10

18/25 - 42/10 is -87/25.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 10 is 50
   
   Next, find the equivalent fraction of both fractional numbers with denominator 50
2. For the 1st fraction, since 25 × 2 = 50,
   18/25 = 18 × 2/25 × 2 = 36/50
3. Likewise, for the 2nd fraction, since 10 × 5 = 50,
   42/10 = 42 × 5/10 × 5 = 210/50
4. Subtract the two like fractions:
   36/50 - 210/50 = 36 - 210/50 = -174/50
5. After reducing the fraction, the answer is -87/25

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