Answers

Subtract 9/90 from 21/10

1^st number: 2 1/10, 2^nd number: 9/90

21/10 - 9/90 is 2/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 10 × 9 = 90,
   21/10 = 21 × 9/10 × 9 = 189/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   9/90 = 9 × 1/90 × 1 = 9/90
4. Subtract the two like fractions:
   189/90 - 9/90 = 189 - 9/90 = 180/90
5. After reducing the fraction, the answer is 2/1

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