to find the average number of gallons spilled per minute, you can divide the amount spilled (5/6 gallon) by the time it took (2/3 minute):(5/6 gallon) ÷ (2/3 minute) = (5/6) ÷ (2/3) = (5/6) * (3/2) = 15/12 = 5/4 gallon per minute.so, the average number of gallons spilled per minute is 5/4 gallon.