Answers

Subtract 21/10 from 36/45

1^st number: 36/45, 2^nd number: 2 1/10

36/45 - 21/10 is -13/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 10 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 45 × 2 = 90,
   36/45 = 36 × 2/45 × 2 = 72/90
3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
   21/10 = 21 × 9/10 × 9 = 189/90
4. Subtract the two like fractions:
   72/90 - 189/90 = 72 - 189/90 = -117/90
5. After reducing the fraction, the answer is -13/10

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