Answers

Subtract 9/10 from 7/90

7/90 - 9/10 is -37/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 10 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   7/90 = 7 × 1/90 × 1 = 7/90
3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
   9/10 = 9 × 9/10 × 9 = 81/90
4. Subtract the two like fractions:
   7/90 - 81/90 = 7 - 81/90 = -74/90
5. After reducing the fraction, the answer is -37/45

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