This math topic focuses on calculating the percentage change when a number decreases by 10%. It introduces how to find out the new total after a 10% reduction and then prompts learners to calculate the percentage change from the original number to the reduced number. Each problem provides an original number, subtracts 10%, and then challenges the learner to determine what percentage the original number has decreased to reach the new total. This is crucial for understanding basic percentage decrease calculations and how percentages reflect change in values.
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What percent did the number change by?
10% of 70 is 7
What is the % change if 70 shrinks to 63