Answer:
the percentage of water lost is 7.5%
Explanation:
first subtract 222 by 240 to know how much water was lost.
240 - 222 = 18
now divide the amount of water lost (18L) by the amount of water the tank originally had (240L)
18/240 = 0.075 = 7.5%
So, the percentage of water lost is 7.5%, with now the tank having 92.5% of water, compared to what it originally had.
I hope this helps! :)