Answer:
The percent decrease from 7 to 6.3 is 10%.
Explanation:
To find the percent decrease, you subtract your ending value-6.3 in this case-from your starting value, 7. That should give you -0.7. You take that number and divide it by the starting value, which leaves you with -0.1. You would next take that value and multiply it by 100 to find the percent decrease.