Well, isn't that a happy little math problem! To find 80 percent of 2500, you simply multiply 2500 by 0.8. So, 80 percent of 2500 is 2000. Just imagine all the beautiful things you could do with that number!
2500 divided 1020 = 2.450980392156863
2500
2500
0.4
1250
It is: 2000/2500 times 100 = 80%
0.0032
833.3333
6400 divided but 80 = 80
80
6.8