If memory access takes 20 ns with cache and 110 ns with out it, then the ratio (cache uses a 10 ns memory) is

If memory access takes 20 ns with cache and 110 ns with out it, then t

1.	If memory access takes 20 ns with cache and 110 ns with out it, then the ratio (cache uses a 10 ns memory) is
A.	93%
B.	90%
C.	88%
D.	87%
Answer» C. 88%