text: how to add percents to whole numbers? add 10 percent to 6 this question could be interpreted two ways. 1st interpretation: "10%" = 0.10. in this case, the answer would simply be 6+0.10 = 6.10.  2nd interpretation: "10%" = 10% of 6. first, let's determine what 10% of 6 is.  to find 10% of 6, we must multiply 6 by 10% (remember that 10% is 0.10). 10% of 6 = 6*0.10 = 0.60 now we must add that to our initial quantity. 6+0.60 = 6.60