65% of 39 is 60 the answer is 60
ANSWER: B = 10/C
You have to isolate the variable by dividing each side by factors that don’t contain the variable
If each cube is (1/3) inch on each side, then the volume of each cube is
(1/3) * (1/3) * (1/3) = (1 / 27) of a cubic inch
3,996 of those (1 / 27) inch cubes =
3,996 * (1 / 27) = 148 cubic inches
Increasing 50 by x% can be written as:
.................(1)
Decreasing 70 by x % can be represented by the expression:
...........(2)
Now we are given in the question that if we increase 50 by x% and 70 by x%, then the two values are equal.
so equating (1) and (2) , we get

bringing 0.01x to the left side:


taking 50 to the right side, subtracting it from 70


dividing both sides by 0.02

Answer x=2000