Answers

Subtract 5/21 from 9/8

1^st number: 1 1/8, 2^nd number: 5/21

9/8 - 5/21 is 149/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 21 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 8 × 21 = 168,
   9/8 = 9 × 21/8 × 21 = 189/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   5/21 = 5 × 8/21 × 8 = 40/168
4. Subtract the two like fractions:
   189/168 - 40/168 = 189 - 40/168 = 149/168

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