Answers

Subtract 45/50 from 72/90

72/90 - 45/50 is -1/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 50 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 90 × 5 = 450,
   72/90 = 72 × 5/90 × 5 = 360/450
3. Likewise, for the 2nd fraction, since 50 × 9 = 450,
   45/50 = 45 × 9/50 × 9 = 405/450
4. Subtract the two like fractions:
   360/450 - 405/450 = 360 - 405/450 = -45/450
5. After reducing the fraction, the answer is -1/10

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