Answers

Subtract 28/50 from 7/90

7/90 - 28/50 is -217/450.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 50 is 450
2. For the 1st fraction, since 90 × 5 = 450,
   7/90 = 7 × 5/90 × 5 = 35/450
3. Likewise, for the 2nd fraction, since 50 × 9 = 450,
   28/50 = 28 × 9/50 × 9 = 252/450
4. Subtract the two fractions:
   35/450 - 252/450 = 35 - 252/450 = -217/450

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