Answers

Subtract 75/70 from 49/90

1^st number: 49/90, 2^nd number: 1 5/70

49/90 - 75/70 is -166/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   49/90 = 49 × 7/90 × 7 = 343/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   75/70 = 75 × 9/70 × 9 = 675/630
4. Subtract the two like fractions:
   343/630 - 675/630 = 343 - 675/630 = -332/630
5. After reducing the fraction, the answer is -166/315

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