Answers

Subtract 63/90 from 7/4

1^st number: 1 3/4, 2^nd number: 63/90

7/4 - 63/90 is 21/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 4 × 45 = 180,
   7/4 = 7 × 45/4 × 45 = 315/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   63/90 = 63 × 2/90 × 2 = 126/180
4. Subtract the two like fractions:
   315/180 - 126/180 = 315 - 126/180 = 189/180
5. After reducing the fraction, the answer is 21/20
6. In mixed form: 11/20

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