Group technology and processing cycle efficiency

Ray Brown's company, Whisper Voice Systems, is trying to increase its processing cycle efficiency $($PCE$).$

Because Ray has a very limited budget, he has been searching for a way to increase his PCE by using

group technology. One of Ray's manufacturing managers, Maria Lopez, has been studying group

technology and claims that with minimal costs that includes downtime in the operation, she can

rearrange existing machinery and workers and improve PCE. Ray is quite skeptical about this and

decides to allow Maria to rearrange a small part of his operation. For Ray to be satisfied, he has

stated that PCE must increase by $12\%.$

PCE data before and after the rearrangement are as follows:

a$)$ What was the PCE for Whisper Voice Systems before the rearrangement?

Round to two decimals.

b$)$ What was the PCE for Whisper Voice Systems after the rearrangement?

Round to two decimals.

$$

c$)$ By how much did the PCE change after the rearrangement?

Enter as a positive amount. Express as a percentage, two decimals.

d$)$ Did the change satisfy Ray's improvement requirement?

Need help with question c$).$ my answer is wrong