Answers

Subtract 64/45 from 21/4

1^st number: 5 1/4, 2^nd number: 1 19/45

21/4 - 64/45 is 689/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 45 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 4 × 45 = 180,
   21/4 = 21 × 45/4 × 45 = 945/180
3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
   64/45 = 64 × 4/45 × 4 = 256/180
4. Subtract the two like fractions:
   945/180 - 256/180 = 945 - 256/180 = 689/180
5. In mixed form: 3149/180

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