Answers

Subtract 45/7 from 30/90

1^st number: 30/90, 2^nd number: 6 3/7

30/90 - 45/7 is -128/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 7 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   30/90 = 30 × 7/90 × 7 = 210/630
3. Likewise, for the 2nd fraction, since 7 × 90 = 630,
   45/7 = 45 × 90/7 × 90 = 4050/630
4. Subtract the two like fractions:
   210/630 - 4050/630 = 210 - 4050/630 = -3840/630
5. After reducing the fraction, the answer is -128/21

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