Answers

Subtract 4/70 from 64/90

64/90 - 4/70 is 206/315.

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,
   64/90 = 64 × 7/90 × 7 = 448/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   4/70 = 4 × 9/70 × 9 = 36/630
4. Subtract the two like fractions:
   448/630 - 36/630 = 448 - 36/630 = 412/630
5. After reducing the fraction, the answer is 206/315

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