Help with an arithmetic problem I work in the problem, my company is to do gas station management, now the end of the calculation oil loss For example, the total loss and inventory gain (+ 400 liters), but 90% of gasoline loss (- 180 liters), 93% of gasoline loss (- 200 liters), 0% of diesel loss (+ 780 liters), I want to calculate the percentage of 90% of gasoline loss in the total loss?

Help with an arithmetic problem I work in the problem, my company is to do gas station management, now the end of the calculation oil loss For example, the total loss and inventory gain (+ 400 liters), but 90% of gasoline loss (- 180 liters), 93% of gasoline loss (- 200 liters), 0% of diesel loss (+ 780 liters), I want to calculate the percentage of 90% of gasoline loss in the total loss?

-180/400=-9/20=-45%