2

Which one is correct or if both are correct, is there any difference?

The change is a 10 percent increase of tuition

The change is a 10 percent increase in tuition

6

There has been an increase of ten per cent in the tuition fees.

The minister announced that there would be an increase of fifty cents in the tax on fuel.

There is generally a rise in the amount or number of something. An increase of X tells us the amount or percentage of the rise.

  • So you mean in them example I provided, the second form is correct in the first form is incorrect? – Aliweb Nov 4 '14 at 18:25
  • @tunny Is "in" also the only correct choice if I talk about abstract quantities, as in "we observe a strong decrease of y as a function of x"? – painfulenglish Nov 22 '18 at 11:03
  • @Aliweb that's right. "increase in tuition" is the right one. – Alan Evangelista Jul 19 '19 at 16:00

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