Answers

Subtract 21/45 from 10/70

10/70 - 21/45 is -34/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 45 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   10/70 = 10 × 9/70 × 9 = 90/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   21/45 = 21 × 14/45 × 14 = 294/630
4. Subtract the two like fractions:
   90/630 - 294/630 = 90 - 294/630 = -204/630
5. After reducing the fraction, the answer is -34/105

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