Answers

Subtract 8/90 from 15/70

15/70 - 8/90 is 79/630.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   15/70 = 15 × 9/70 × 9 = 135/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   8/90 = 8 × 7/90 × 7 = 56/630
4. Subtract the two like fractions:
   135/630 - 56/630 = 135 - 56/630 = 79/630

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