ACT Math : Arithmetic
Study concepts, example questions & explanations for ACT Math
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Example Questions
Example Question #251 : Arithmetic
A set of cards were purchased for 
This question is really asking a hidden percentage change question. It really means, "The price changed from 
Solving for 
Example Question #11 : How To Find Amount Of Profit
The profit on a particular product per unit is measured as a percentage of the cost to produce that unit. If 
Remember, percentage profit is a ratio between two numbers. The ratio stays the same whether the numbers reflect hundreds of units sold or just one unit (unless otherwise told). So to find our answer, we only need to calculate the overall profit percentage.
Example Question #11 : How To Find Amount Of Profit
In business, profit is defined as revenue minus expenses. A profit is often expressed as a percentage of total revenue.
A company posts a 
If a profit of 
Now, subtract the profit from the total revenue to calculate expenses:
Thus, the quarterly expenses were 
Example Question #12 : How To Find Amount Of Profit
Manufacturing a particular product produces a profit of 
Calculating a percentage profit is the same as calculating a percent change. To find percent change, subtract the "old" amount from the "new" amount, then divide the result by the "old" amount. The result is a percent increase if positive and a percent decrease if negative.
Example Question #161 : Percentage
A particular product is sold for 
Calculating a percentage profit is the same as calculating a percent change. To find percent change, subtract the "old" amount from the "new" amount, then divide the result by the "old" amount. The result is a percent increase if positive and a percent decrease if negative.
Example Question #161 : Percentage
A cassette tape sells for 
Calculating a percentage profit is the same as calculating a percent change. To find percent change, subtract the "old" amount from the "new" amount, then divide the result by the "old" amount. The result is a percent increase if positive and a percent decrease if negative.
Example Question #11 : How To Find Amount Of Profit
A product sells for 
There is not enough information to answer the question.
Calculating a percentage profit is the same as calculating a percent change. To find percent change, subtract the "old" amount from the "new" amount, then divide the result by the "old" amount. The result is a percent increase if positive and a percent decrease if negative.
Example Question #1 : Decimals With Fractions
When 5/11 is written as a decimal, what is the 100th digit to the right of the decimal point?
4
5
0
1
2
5
When 5 is divided by 11, the decimal is 0.45 repeating, with a 5 in the hundreths place. The key here is to recognize that 100 is an even number, and the 5 in 0.45 is two places to the right of the decimal point (2 also being an even number).
Example Question #251 : Arithmetic
Find the sum of the following:
To get the decimal from a fraction, divide the numerator by the denominator
Example Question #252 : Arithmetic
Find the sum to the nearest hundredth:
1. Convert the fractions to decimals by division:
2. Add the corresponding whole numbers to the decimals:
3. Add the two decimals:
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