100%/x%=16/13 (100/x)*x=(16/13)*x First thing to do is multiply both sides of the equation by x: 100=1.23076923077*x Next we shall divide both sides of the equation by (1.23076923077) to get x <span>100/1.23076923077=x </span> <span>81.25=x </span>So now your final answer is: 13 is 81.25% of 16