Answer:
$149.40
Explanation:
The original value of the bike is worth 100%, and this is $166.00.
Let's work out 10%
To this, we divide the original amount by 10 (100% ÷ 10= 10%),

So now, we know that 10% = 16.60.
So, to get this to 90%, we multiply this value by 9 (10% × 9 = 90%),

This means that the sale price at 90% is equal to $149.40.