Ethanol Blend ⇆ Target

Ethanol type E98 E85 Target Ethanol Blend E30 E35 E40 E45 E50 E55 E60 E65 E70 I already have ethanol in the tank

Current ethanol % in tank

I want to add pump gas

Litres of 91 to add (contains 10 % ethanol)

How many liters in the tank Calculate