Interpreting Percent Change in Data Tables and Graphs
Interpreting percent change in data tables and graphs is a Grade 6 skill in Big Ideas Math Advanced 1, Chapter 15: Percents. Students calculate percent increase or decrease between two values using the formula Percent Change = (New - Old) / Old x 100%, then analyze trends shown in data tables and graphs.
Key Concepts
When analyzing data tables and graphs for percent change, identify the original and new values, then apply the appropriate formula: percent of increase = $\frac{\text{new amount} \text{original amount}}{\text{original amount}} \times 100\%$ or percent of decrease = $\frac{\text{original amount} \text{new amount}}{\text{original amount}} \times 100\%$.
Common Questions
How do you calculate percent change in Grade 6?
Use the formula: Percent Change = ((New Value - Old Value) / Old Value) x 100%. A positive result is a percent increase; a negative result is a percent decrease.
What is the difference between percent increase and percent decrease?
Percent increase means the new value is higher than the old value (positive change). Percent decrease means the new value is lower than the old value (negative change). Both are calculated using the same formula with the original value as the base.
How do you read percent change from a graph or table?
Identify the starting and ending values from the graph or table, then apply the percent change formula. Look for visual cues — rising values indicate an increase, falling values indicate a decrease.
Where is percent change taught in Big Ideas Math Advanced 1?
Interpreting percent change in data tables and graphs is covered in Chapter 15: Percents of Big Ideas Math Advanced 1, the Grade 6 math textbook.