How do I refer to absolute change in 2 percentages?

Question

I'm writing a paper and I have 45% WER (word error rate) under one condition. Under a different condition, that improves to a 34% WER. It seems incorrect to say that I had an 11% improvement in WER. What would be the correct way to state this?

Answer 1

You can say, that:

• The error has decreased by $11$ percentage points

or

• The error has decreased by $24.4\%$