Answers

Subtract 40/90 from 54/70

54/70 - 40/90 is 103/315.

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,
   54/70 = 54 × 9/70 × 9 = 486/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   40/90 = 40 × 7/90 × 7 = 280/630
4. Subtract the two like fractions:
   486/630 - 280/630 = 486 - 280/630 = 206/630
5. After reducing the fraction, the answer is 103/315

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