Just divide the numbers in a calculator.
The answer is .005
10
10
0.005
When a number ends in a zero, to divide that number by 10, we just remove the (last) zero.... so 2000 / 10 = 200
10% of 40000 is 4000 (divide it by 10) so half of that is 2000 (10 divided by 2 is 5)
500
2000
2000
2000
100000 divided by 50 = 2000
250
33.3333