Question 1086442
66%=x l
54%=8 l
64%=(8+x) l
.66x+.54(8)=.64(8+x)
.66x+4.32=5.12+.64x
.02x=0.80
x=40 l
Check.
66% is only 2% from 64%, so it will need to bring up the 54%, which is 10% away.  There needs to be 5 times as much 60% than 54%.