bleach, boiling (sterilization), disinfectant.
63 percent - without using a calculator !
540 - without using a calculator !
16475 - without using a calculator !
1080 - without using a calculator !
13.5 - without using a calculator !
36.5... without using a calculator.
6150 - without using a calculator !
42.9 without using a calculator !
Without using a calculator... 4018 !
3400 - without using a calculator !
620 - without using a calculator !
2 - without using a calculator !