I think it it a fragment by think I mean I think I know the sentence
First ask yourself what is in the hundredths place?
The 5
Then ask yourself what is to the right of that digit?
A 0, because .15=.150
Since the 0 is not bigger than a 5, the 5 in the hundredths place stays the same.
The answer is .15
Lets say the number = x
the equation is:
2/3 x - 6 = -10 (add 6 to each side)
2/3 x - 6 + 6 = -10 + 6
2/3 x = -4 (multiply each side by 2/3 's reciprocal or 3/2)

x =

x = -6
The number is -6