Answer:
The answer to your question is:
a) as a decimal number = 0.00055
b) as a percent 0.055%
Step-by-step explanation:
Data
Navajo people = 169 000
American people = 308 700 000
a) Navajo people as a decimal number = 169 000 / 308 700 000
= 169 / 308 700
= 0. 00055
b) 308 700 000 -------------------- 100 %
169 000 --------------------- x
x = 169000(100) / 308700000 = 0.055