A petroleum refinery lowered the oil level in one of its full storage tanks by draining out 7,326 gallons of oil, which was exactly 30 percent of the oil in the tank. Approximately what percent of the remaining oil would need to be drained in order to have drained a total of 40 percent of the oil that was originally in the tank?
a)10%
b)12%
c)14%
d)17%
e)20%
thank you.
a)10%
b)12%
c)14%
d)17%
e)20%
thank you.
