[tex]\frac{5}{8}[/tex] of total sugar was drink by humming bird
Given that,
When the Mario kept the humming feeder on Friday it had [tex]\frac{3}{4}[/tex] cup of sugar water
When he sees on Monday, it had only [tex]\frac{1}{8}[/tex] of sugar water
So, this means the water is consumed by the humming bird will be the difference of the two values:-
[tex]\text { Sugar water consumed }=\frac{3}{4}-\frac{1}{8}[/tex]
On solving we get,
[tex]=\frac{3}{4}-\frac{1}{8}=\frac{24-4}{32}=\frac{20}{32}[/tex]
[tex]=\frac{5}{8}[/tex]
Hence, the amount of sugar water consumed is [tex]\frac{5}{8}[/tex] of total sugar at the starting
