Answers

Subtract 5/21 from 2/45

2/45 - 5/21 is -61/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 21 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   2/45 = 2 × 7/45 × 7 = 14/315
3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
   5/21 = 5 × 15/21 × 15 = 75/315
4. Subtract the two like fractions:
   14/315 - 75/315 = 14 - 75/315 = -61/315

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