Answers

Subtract 24/70 from 18/90

18/90 - 24/70 is -1/7.

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,
   18/90 = 18 × 7/90 × 7 = 126/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   24/70 = 24 × 9/70 × 9 = 216/630
4. Subtract the two like fractions:
   126/630 - 216/630 = 126 - 216/630 = -90/630
5. After reducing the fraction, the answer is -1/7

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