It is still 20 cents. A decimal representation does not imply a change in the measurement units. If this is required then you need to specify the units into which the quantity is to be converted.
One and a half cents in decimals is 0.015
Five and one half cents in decimals is 0.055
$0.05
2.2 cents
it is in simplest form unless you want to write in decimals.....
You write it as 3.5 cents.
0.01
0.505
0.565
0.555
Without decimals there would be no difference between dollars and cents.
0.10