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Last week John’s hamster drank 45 mL of water. This week he drank 25 mL of water. By what percent did the hamster’s intake of water decreased?

Last week Johns hamster drank 45 mL of water This week he drank 25 mL of water By what percent did the hamsters intake of water decreased class=

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Lanuel

Answer:

Percentage decrease is 55%.

Step-by-step explanation:

Given the following data;

Original (old) number = 45mL

New number = 20mL

[tex] Percentage \; decrease = \frac{change\; in \;amount}{original\;number} * 100[/tex]

Change in amount = 45 - 20 = 25

Substituting into the equation, we have;

[tex] Percentage \; decrease = \frac{25}{45} * 100[/tex]

[tex] Percentage \; decrease = 0.55 * 100[/tex]

[tex] Percentage \; decrease = 55%[/tex]

Therefore, the hamster’s intake of water decreased by 55%.

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