Answer:
1.base 80,rate 60, percentage 25%,n=25%
2.base 870/869,rate 113, percentage 13%,n=870
3.base 500,rate 240, percentage 48%,n=48%
4.base 4800,rate 1200, percentage 25%,n=4800
5.base 90,rate 63, percentage 70%,n=63
