Can someone explain to me the following: If a number increases from 108,7 to 113,7 how much in percent has it increased? First I tried to do 108,7 / 113,7 = 0,956. 1 - 0,956 = 0,0439. In other words, an increase of 4,39%. This turns out to be wrong. 113,7 / 108,7 = 1,0459 -> an increase of 4,59% is correct, but I fail to see the logic in that the last approach is correct. What am I actually calculating in my first try?