Answers

Subtract 9/8 from 84/90

1^st number: 84/90, 2^nd number: 1 1/8

84/90 - 9/8 is -23/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 8 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 90 × 4 = 360,
   84/90 = 84 × 4/90 × 4 = 336/360
3. Likewise, for the 2nd fraction, since 8 × 45 = 360,
   9/8 = 9 × 45/8 × 45 = 405/360
4. Subtract the two like fractions:
   336/360 - 405/360 = 336 - 405/360 = -69/360
5. After reducing the fraction, the answer is -23/120

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