Answer:
increase, 100%.
Step-by-step explanation:
2/3 is 1/3 + 1/3. if you think of 1/3 as your starting point, you want to know how much you have changed, but IN TERMS OF 1/3. one way to do this is to subtract your starting value (1/3) from your new value, and then divide.
÷
which is really
×
which simplifies to 1.
1 as a percent is 100%.