Question 1520
<B>Stupid way of solving it</B>: First you need to find out the number.

{{{
(2/

3)*number = 30}}}

{{{number = 30*(3/2)}}}
number = 45
twice the number is twice 45 is 90
1/3 of 90 is 30.

<B>Smarter way of solving it</B>: two thirds is the same as 1/3 of twice, it is another way of saying the same thing. So, then, if 2/3 of a number is 30, 1/3 of twice the number is the same thing