You write it as 3.5 cents.
$0.045
Either $0.115 or 11.5¢
You write the dollars to the left of the decimal point; and the cents to the right, using two decimals.
2.2 cents
You write it as 3.5 cents.
55.5 cents or $.555
One and a half cents in decimals is 0.015
0.565
0.505
Five and one half cents in decimals is 0.055
$0.045
$0.125
Either $0.115 or 11.5¢
You write the dollars to the left of the decimal point; and the cents to the right, using two decimals.
.555
$0.05