Question 785456: Fertilizing potplants it's 40ml to every 8/9L of water. I only have a 2L capacity. How many ml do I measure please :)
Answer by KMST(5328)   (Show Source):
You can put this solution on YOUR website! The ratio of (fertilizer mL) to liters of water is 40 to 8/9.
Water volume will be measured in liters, fertilizer in milliliters,
No conversions needed.
IF IT IS A REAL LIFE PROBLEM,
The bucket probably has some graduation lines to roughly measure the amount of water, marking  ,   ,  .
I would just double both quantities.
I would measure  liters of water.
That's between  and 1.8 liters, because
 
and you hopefully have markings for or  on the bucket.I would mix into that  fertilizer.
That is 1/3 of a cup.
If you could only measure exactly 2L, ask a friendly chemist (like me) to borrow a graduate cylinder to measure 86mL of fertilizer (calculated below) and dilute that to the 2L mark with water.
IF IT IS A MATH CLASS PROBLEM,
you are probably expected to calculate how to make a full 2.0L of dilued fertilizer.
  of water-fertilizer mix is desired.
  of water
When that amount of water is mixed with  fertilizer, you get
    mix
The fertilizer to final mix ratio (both volumes in mL) is
(For a nathematically exact answer, we need to work with fractions.
If you are expected/allowed to approximate to a decimal, you could use 929, or 928.9, or 928.888... with up to as many digits as your calculator can handle).
 = mL of fertilizer to be mixed with water.
The proportion to find how much fertilizer to use for 2L (2000mL) of diluted fertilizer is
Simplifying
 
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