



 
Hi Brian, 1.28 is approximately half of 2.43 so the scrap rate has been cut nearly in half. If you want to say it in percentage terms the calculation is
I would however not say there is a 47% improvement as this might be interpreted as the amount of scrap has been reduced by 47%. It is always dangerous to calculate with percentages. The numbers 2.43% and 1.28% are percentages of different things. You need to be careful to report that it is the RATE which has been cut in half. Harley  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 