Answers

Subtract 7/70 from 28/63

28/63 - 7/70 is 31/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   28/63 = 28 × 10/63 × 10 = 280/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   7/70 = 7 × 9/70 × 9 = 63/630
4. Subtract the two like fractions:
   280/630 - 63/630 = 280 - 63/630 = 217/630
5. After reducing the fraction, the answer is 31/90

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