Answer:
80%
Step-by-step explanation:
Cause four divided by five equals .8 so then multiply it by ten and u get 80%
9514 1404 393
Answer:
100°
Step-by-step explanation:
Arc BC is twice the measure of inscribed angle BEC, so is ...
arc BC = 2×50°
arc BC = 100°
You can perform all kind of operation that are one the inverse of the other, so that the value won't change. For example, you can multiply and divide by 2:

Or add and subtract 5:

The answer is EGH and EFG