How many mls of 55% Dextrsoe and water do you nee to make 980 mls of 27.5 Dextrose? No clue on what to do.
amount of dextr... ----- x
amount of water ------ 980-x
.55x + 0(980-x) = .275(980)
.55x = 269.5
x = 490 mls
so you need 490 mls of the dextrose and 490 mls of water
(notice that 27.5% = (1/2) of 55% )