Answer :

Step 1

Let the energy drink be x

Step 2

1/4 of the energy drink left = (1/4)x = original amount

Step 3

1/4 of 1/4x = 1/4 x 1/4x = (1/16)x = amount drank

Step 4

Find much of the energy drink you have left

Fraction of energy drink left = Original amount - amount drank

Fraction of energy drink left = (1/4)x - (1/16)x = (3/16)x

Hence you will have 3/16 of the energy drink left

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