300/5= 60
60x4(children)=240
240 seats will be for children and 60 seats for adults.
Do 100÷8, then whatever the answer is multiply it by 8 and ta da
His percentage of change in the amount of quarts is 82.22%.
Initial amount of lemonade = 45 quart
End amount of lemonade = 8 quart
Change in amount = 45 - 8
= 36
Percent = 
= 
= 0.8222 * 100
= 82.22%
Hence, his percentage of change is 82.22%.
To learn more about percentage here:
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