Question 1
The amount of Hanna's bill for a food order was `$50`. Hanna gave a tip of `20%` of the amount of the bill. What is the amount, in dollars, of the tip Hanna gave?
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Question 2
In 2008, Zinah earned `14%` more than in 2007, and in 2009 Zinah earned `4%` more than in 2008. If Zinah earned `y` times as much in 2009 as in 2007, what is the value of `y`?
A) `0.5600`
B) `1.0056`
C) `1.1800`
D) `1.1856`
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Question 1
The amount of Hanna's bill for a food order was `$50`. Hanna gave a tip of `20%` of the amount of the bill. What is the amount, in dollars, of the tip Hanna gave?
Answer: `10`
To find the tip amount, calculate `20%` of `$50`. This can be done by converting the percentage to a decimal or fraction: `0.20 xx 50 = 10`. The tip was `$10`.
Question 2
In 2008, Zinah earned `14%` more than in 2007, and in 2009 Zinah earned `4%` more than in 2008. If Zinah earned `y` times as much in 2009 as in 2007, what is the value of `y`?
A) `0.5600`
B) `1.0056`
C) `1.1800`
D) `1.1856`
Answer: D
Let `h` be the earnings in 2007. An increase of `14%` means the 2008 earnings were `1.14 xx h`. An increase of `4%` on top of that means the 2009 earnings were `1.04 xx (1.14 xx h)`. Multiplying the factors gives `1.04 xx 1.14 = 1.1856`. So, Zinah earned `1.1856` times as much in 2009 as in 2007.
Question 1
The amount of Hanna's bill for a food order was `$50`. Hanna gave a tip of `20%` of the amount of the bill. What is the amount, in dollars, of the tip Hanna gave?
Question 2
In 2008, Zinah earned `14%` more than in 2007, and in 2009 Zinah earned `4%` more than in 2008. If Zinah earned `y` times as much in 2009 as in 2007, what is the value of `y`?
A) `0.5600`
B) `1.0056`
C) `1.1800`
D) `1.1856`
