The equation would be c÷3=7 (haha i think thats the answer)
7.5 gallons. (5x60)/40 5x60 being the equation to find the total miles driven
To find the answer, all you must do is convert 14% into a decimal by moving the decimal point two units to the left which will give you the number: 0.14. Multiply 21 by 0.14 and you should get your answer: 2.94. This means 14% of 21 is 2.94.