Answer:
0.64, 3/10, 0.21
Step-by-step explanation
Given the following numbers 3/10, 0.64, 0.21
Before we arrange them form greatest to lowest, we need to express them as percentage first as shown:
3/10 = 3/10 * 100
3/10 = 30%
0.64 = 0.64 * 100
0.64 = 64%
0.21 = 0.21 * 100
0.21 = 21%
We can see that arrangement from greatest to lowest is 64%, 30%, 21%
Hence arranging based on the values given is 0.64, 3/10, 0.21,