It is easier and quicker to answer this question by using the calculator in your computer compared with posting it on WA. But, since you are obviously not capable of carrying out that simple task, the answer is 133333333.33...
40000
0.79
2000-400000000 = -399998000
0.028 x 400000000 = 11200000
20000000 x 20 = 400000000
Dollars, or what?
percent of 4 000 000 = 400000000%4000000= 4000000 * 100%= 400000000%
400000000/1000 = 400000 days = 1095.1 years, approx.
20,000
400000000 = 400,000,000
400000000
in 400000000 century