If the rule says I should mix 1 cup of fertilizer in every 1 gallon of water, how much fertilizer should I mix in 1 litre of water?

1 gallon = 16 cups

1 cup = 1 / 16 gallons

Proportion is:

1 cup of fertilizer / 1 gallon of water = 1 / 16

This proportion will also apply to liters.

1 / 16 liter of fertilizer / 1 liter of water

0.0625 liter of fertilizer / 1 liter of water

Since:

1liter = 1000 mililiters you can write the result as

62.5 mililiters of fertilizer / 1 liter of water

To determine how much fertilizer you should mix in 1 liter of water, we need to convert the given measurements to the same unit.

1 gallon is approximately equal to 3.785 liters. So, if the rule says to mix 1 cup of fertilizer in 1 gallon of water, we can convert this to liters by multiplying both sides of the ratio by the conversion factor:

1 cup fertilizer : 1 gallon water

1 cup fertilizer : 3.785 liters water

Now that we have the ratio in liters, we can use it to find the amount of fertilizer needed for 1 liter of water.

1 liter water * (1 cup fertilizer / 3.785 liters water) = 0.264 liters of fertilizer

Therefore, you would need to mix approximately 0.264 liters (264 milliliters) of fertilizer in 1 liter of water.