Answer:
91%
Step-by-step explanation:
As per the given pie chart, Non-Renewable sources include Coal, Nuclear power, Natural gas, and Petroleum.
Percentage of Coal = 52%
Percentage of Nuclear power = 16%
Percentage of natural gas = 20%
Percentage of Petroleum = 3%
∵ Total percentage of non-renewable sources of energy = Coal + nuclear power + natural gas + petroleum
= 52% + 16% + 20% + 3%
= 91%
While the other 9% is renewable energy including 7% Hydropower and 2% of geothermal, wind, solar energy, etc.
Thus, 91 % is the combined percentage of US energy produced by all of the nonrenewable sources.