Answers

Subtract 40/70 from 16/90

16/90 - 40/70 is -124/315.

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,
   16/90 = 16 × 7/90 × 7 = 112/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   40/70 = 40 × 9/70 × 9 = 360/630
4. Subtract the two like fractions:
   112/630 - 360/630 = 112 - 360/630 = -248/630
5. After reducing the fraction, the answer is -124/315

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