Question

Why is 100 to 105 a greater increase than 110 to 115? 

Answer 1

100/105=20/21=0.95238

110/115=22/23=0.95652

lim 5*n/(n+1)*5  ⇒1

(n⇒endlessness)

100/105<110/115<120/125<...<1000000/1000005<...<5*n/(n+1)*5  ⇒1

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Answer 2

While both represent an increase of 5 when you consider percentage of increase 105/100=1.05 or a 105% increase as compared to 115/110=1.0454 or a 104.54% increase we see that the great increase in terms of percentage increase is between 100 and 105.