Answer:
a) Molly had $212.50 in her account to begin with.
b) She has $127.50 in her account after buying the bicycle.
Explanation:
40% of what number is 85.
.4x = 85 Divide both sides by .4
x = 212.50
212.50 - 85 = 127.50
Another way to look at it is if she spent 40%, she still have 60% left in her account.
.6 x 212.50 = 127.50