Answers

Subtract 45/21 from 18/60

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

18/60 - 45/21 is -129/70.

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,
   45/21 = 45 × 20/21 × 20 = 900/420
4. Subtract the two like fractions:
   126/420 - 900/420 = 126 - 900/420 = -774/420
5. After reducing the fraction, the answer is -129/70

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