Digital SAT Math: Practice Questions-Percentages - New Syllabus
DSAT MAth Practice questions – all topics
- Problem-solving and Data Analysis Weightage: 15% Questions: 5-7
- Ratios, rates, proportional relationships, and units
- Percentages
- One-variable data: distributions and measures of centre and spread
- Two-variable data: models and scatterplots
- Probability and conditional probability
- Inference from sample statistics and margin of error
- Evaluating statistical claims: observational studies and Experiments
DSAT MAth and English – full syllabus practice tests
Question Easy
There are 435 voting members of the US House of Representatives. If \(b\) voting members are in favor of a certain bill, which expression represents the percentage of the voting members in favor of the bill?
A. \(100\left(\frac{b}{435}\right)\)
B. \(100\left(\frac{435}{b}\right)\)
C. \(435\left(\frac{b}{100}\right)\)
D. \(435(100 b)\)
▶️ Answer/Explanation
Ans: A
Percentage is calculated as the ratio of members in favor (\( b \)) to total members (435), multiplied by 100.
Expression: \( 100 \left( \frac{b}{435} \right) \).
▶️ Answer/Explanation
Ans: D
Let \( x \) be the number. Then, 21% of \( x \) is 21: \( 0.21x = 21 \).
Solve: \( x = \frac{21}{0.21} = 100 \).
So, 21 is 21% of 100.
▶️ Answer/Explanation
Ans: D
Reduction: \( 50 \times 0.20 = 10 \).
Sale price: \( 50 – 10 = 40 \).
So, the sale price is \( \$40 \).