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.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Percent change in a shrinking number (10%) - Concept Intro
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
What percent did the number change by?
10% of 80 is 8
What is the % change if 80 shrinks to 72
Percent change in a shrinking number (10%) - Concept Intro Worksheet
| Math worksheet on 'Percent change in a shrinking number (10%) - Concept Intro (Level 2)'. Part of a broader unit on 'Percentages - Intro' Learn online: app.mobius.academy/math/units/percentages_intro/ |
| 10% of 100 is 10 What is the % change if 100 shrinks to 90 |
| What percent did the number change by? |
| -10% |
| -3% |
| 0% |
| -20% |
| -40% |
| 9% |
| 10% of 80 is 8 What is the % change if 80 shrinks to 72 |
| What percent did the number change by? |
| -13% |
| 30% |
| -20% |
| 10% |
| -10% |
| -15% |
| 10% of 90 is 9 What is the % change if 90 shrinks to 81 |
| What percent did the number change by? |
| -40% |
| -10% |
| -30% |
| -5% |
| 0% |
| 20% |
| 10% of 70 is 7 What is the % change if 70 shrinks to 63 |
| What percent did the number change by? |
| -10% |
| 30% |
| 10% |
| -20% |
| 4% |
| -30% |