Question 222976
A tank holds 800 gallons of water. 
The gauge indicates that the tank is ¾ full = 600 gallons
; then 100 gallons are drained from the tank = 500
  to fill a pool 7/8 full. 
Next, 1/3 of a tank of water is added back in = 500 + (1/3)800 = 766 2/3 gallons
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What fraction of the tank is filled with water?
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Fraction = (766 2/3)/800 =  [2300/3]/800 = 2300/2400 = 23/24
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Cheers,
Stan H.