Question 852862
This operation which produced the  64 pieces also produced 15% scrap.  100-15=85, so the 64 pieces produced is 85% of {good pieces + scrap}.  Call that brace-enclosed quantity, T.  0.85T=64 pieces, so T=75.294, approximately to five figures.  The scrap produced for this 64 good pieces was 0.15(75.294)=11.294 scrap pieces.


The increase in productivity if that 11.294 amount scrap were good instead of scrap would be ...  think about it ....   {{{(85+15)/85=1.17647}}}... approximately, close enough to 17.6% increase in productivity.