ICE emissions/mile are 100% fossil fuel, by your summation above EV emissions/mile are ~80% fossil fuel. That sounds like a reduction in emissions per mile.
Here is some more reading. Start with this news article then go read the original research.
Analysis: When do electric vehicles become cleaner than gasoline cars?It takes a typical electric vehicle about one year in operation to achieve "carbon parity" with a gasoline vehicle. Although the production of EVs and batteries generates more CO2 before the first wheel turns, the total carbon "footprint" of gas cars quickly overtakes that of EVs after 15,000 miles of driving. If the EV draws electricity from a coal-fired grid, however, the catchup period stretches to more than five years. If the grid is powered by carbon-free hydroelectricity, the catchup period is about six months.
The question you should be asking is if the cradle to grave emissions per mile of an ice is more or less than the cradle to grave emissions per mile for the generation of the charge by a with the current mix of electrical generation.
Second question, which ice puts fuel (and emissions) back in the tank while breaking and coasting down hill?
