Answers

Subtract 45/90 from 10/84

10/84 - 45/90 is -8/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   10/84 = 10 × 15/84 × 15 = 150/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   45/90 = 45 × 14/90 × 14 = 630/1260
4. Subtract the two like fractions:
   150/1260 - 630/1260 = 150 - 630/1260 = -480/1260
5. After reducing the fraction, the answer is -8/21

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