Suppose there are x people taking part in the math contest and y people winning the prize, then the calculation is y/x.

According to the meaning of the question: y = (1/3 *1/24+2/7 *16+1/5 *1/kloc-8.

That is, 6/7 * y = (1/72+1/56+1/90) x.

After simplification: y/x = (7 * 7 *10+7 * 9 *10)/(6 * 7 * 8 * 9 *10) = (3 * 8 * 9)/(6 *.

Therefore, the number of award-winning students accounts for 1/20 of the total parameters.