Find the Probability

Joe tossed two fair pennies and peeked at them. He said,

At least one is "Heads" but I won't tell you which.
What is the probability that the other coin is also "Heads?"

Type your probability, expressed as a percentage, in the box below:

%

What is your gender?

Male
Female

Please check your answer. When you are done, push the button below.

Thank You!