Answer:
Step-by-step explanation:
To find percentage difference (whether increase or decrease), you need to first find the difference by subtracting the original value from the new value;
Then, you divide this by the original value and then multiply by 100, so:
% difference = 100(new - original)/original;
So, to apply this:
% difference = 100(5-10)/10
= -50%
The negative sign indicates a decrease, whilst a positive value would mean an increase;
You must be careful how you phrase this, if using the negative sign, so:
You can say a -50% difference or a 50% decrease.
P.S. If you mention that it is a percentage decrease, do not include the negative sign, if simply stating that it is a percentage change or difference then you can include the negative sign, which will make it clear that it is a decrease from the original value.