[torstenvl]

EDIT: I misread—please disregard the below comment.

3.5% decrease.

A 100% increase in speed is a 50% reduction in time.

E.g., traveling 60km at 30km/h takes two hours, but at 60km/h takes one hour.

[dharmab]

A 100x increase is a 9900% increase, not a 100% increase.

[chris_wot]

Thank you, that's what I was interested in. Not sure why I got downvoted, it was a legitimate question as I didn't know what parts were adversely affected.

[loeg]

You're misreading 100x as 100%. 100x is 10,000%.

[Finn_]

100x not 100%. 3,000 km/h takes 1.2 minutes to go 60km.