The article claims a 70% fuel efficiency increase, and another quoted part claims a 70% reduction in fuel use. Which is it?
Other examples:
"Crime rate drops with 8%!" ... compared to what and when?
"Inflation now 2% higher" ... does that mean inflation went from 1% to 1.02% or to 3%?
The mere notion that you can express change of a metric (expressed as percentage), as a percentage would probably destroy the average journalist's brain.