Answers

Subtract 2/45 from 20/21

20/21 - 2/45 is 286/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 21 × 15 = 315,
   20/21 = 20 × 15/21 × 15 = 300/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   2/45 = 2 × 7/45 × 7 = 14/315
4. Subtract the two like fractions:
   300/315 - 14/315 = 300 - 14/315 = 286/315

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