Answers

Subtract 42/25 from 20/36

1^st number: 20/36, 2^nd number: 1 17/25

20/36 - 42/25 is -253/225.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 25 is 900
   
   Next, find the equivalent fraction of both fractional numbers with denominator 900
2. For the 1st fraction, since 36 × 25 = 900,
   20/36 = 20 × 25/36 × 25 = 500/900
3. Likewise, for the 2nd fraction, since 25 × 36 = 900,
   42/25 = 42 × 36/25 × 36 = 1512/900
4. Subtract the two like fractions:
   500/900 - 1512/900 = 500 - 1512/900 = -1012/900
5. After reducing the fraction, the answer is -253/225

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