you have to do mutiplication. how do you know that you have to do mutiplcation because the (of) it means times. so 26 * 2.21 = 0.5746 2.21/x=100/26 (2.21/x)*x=(100/26)*x 2.21=3.8461538461538*x (3.8461538461538) to get x 2.21/3.8461538461538=x 0.5746=x x=0.5746
