So 5.10 is 100% and 0.57 is x% percent means parts out of 100 5.10/100%=0.57/x% since they are equal (exg 2/4=3/6) 5.10/100=0.57/x multipy both sides by x/0.57 to clear fraciton (5.1x)/57=1 multiply both sides by 57 to get rid of the denomeator (bottom number
5.1x=57 divde both sides by 5.1 x=11.1765 increase of 11.2% ( an easy way is (0.57/5.1) times 100)
