When approaching a probability problem, I always write out a model similar to this:
___x___x___x___x___x___
The number of lines is the number of tosses of the coin.
I then insert the probability on each toss, alone, that the coin will land on heads. For each it would be .5 or (1/2) or 50%. The easiest way would either be to use decimals or fractions. The reason for this is because heads is one of two options, also written as 1/2.
Simply insert this number into each slot, since the probability is the same for each throw, as the coin will not change.
.5 x .5 x .5 x .5 x .5 x .5
Therefore, the answer would be .0156, or 1.56%.