Answers

Subtract 63/21 from 18/60

1^st number: 18/60, 2^nd number: 3 0/21

18/60 - 63/21 is -27/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 21 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 60 × 7 = 420,
   18/60 = 18 × 7/60 × 7 = 126/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   63/21 = 63 × 20/21 × 20 = 1260/420
4. Subtract the two like fractions:
   126/420 - 1260/420 = 126 - 1260/420 = -1134/420
5. After reducing the fraction, the answer is -27/10

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