Answers

Subtract 90/84 from 30/75

1^st number: 30/75, 2^nd number: 1 6/84

30/75 - 90/84 is -47/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 84 is 2100
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2100
2. For the 1st fraction, since 75 × 28 = 2100,
   30/75 = 30 × 28/75 × 28 = 840/2100
3. Likewise, for the 2nd fraction, since 84 × 25 = 2100,
   90/84 = 90 × 25/84 × 25 = 2250/2100
4. Subtract the two like fractions:
   840/2100 - 2250/2100 = 840 - 2250/2100 = -1410/2100
5. After reducing the fraction, the answer is -47/70

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