Answers

Subtract 21/90 from 84/63

1^st number: 1 21/63, 2^nd number: 21/90

84/63 - 21/90 is 11/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   84/63 = 84 × 10/63 × 10 = 840/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   21/90 = 21 × 7/90 × 7 = 147/630
4. Subtract the two like fractions:
   840/630 - 147/630 = 840 - 147/630 = 693/630
5. After reducing the fraction, the answer is 11/10
6. In mixed form: 11/10

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