According to some sources, electricity accounts for about 20% of total energy usage. So with your numbers, we would need extra 6.75% of total energy used. 6.75% of 20% is an extra 33.5% of electricity.
100.4q BTU total US energy usage.
37.8q BTU electricity (~37% or ~18% depending on how you count loss).
27.5q BTU transportation (~27% OR ~36% depending on how you count loss).
You're assuming that ~60% of NEW electric generation will come from fossil fuels. We won't have a ~60% loss in electric generation from solar & wind - which is currently ~90% of NEW generation. In 5 years, coal & natural gas will likely drop to ~0% of NEW generation.
If you take energy use used for transport (27.47), multiply it by 25% (because it's more efficient), you get 6.87. That's 18% of how much we generate in electricity today (37.75), not 7%.
So we need extra 7q BTU of electricity, right? Which is about 18% of 37.8!
So, not 7, not 9, we would need at least 18% extra electricity.
TLDR: Your math was wrong!
Show us the data.
> There is.
There is literally no relation.
"Cars use 27% of total energy in US. And 25% of 27% is equal to 7% of electricity generated." HOW??