This math topic focuses on calculating the percent change in shrinking numbers, specifically in multiples of 10%. It includes exercises where students find the percentage decrease when a number decreases from its original value by given percentages. Each problem presents an initial calculation of what 10% of various numbers such as 80, 20, 60, 40, 10, 100 is, followed by a question asking what the percentage change is when that number reduces to a lower value. Answer choices are provided in multiple-choice format to reinforce understanding of percentage decrease calculations.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Percent change in a shrinking number (10% multiples) - 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 10 is 1
What is the % change if 10 shrinks to 8
Percent change in a shrinking number (10% multiples) - Concept Intro Worksheet
| Math worksheet on 'Percent change in a shrinking number (10% multiples) - Concept Intro (Level 1)'. Part of a broader unit on 'Percentages - Intro' Learn online: app.mobius.academy/math/units/percentages_intro/ |
| 10% of 70 is 7 What is the % change if 70 shrinks to 56 |
| What percent did the number change by? |
| -20% |
| 20% |
| -40% |
| -30% |
| -16% |
| -10% |
| 10% of 60 is 6 What is the % change if 60 shrinks to 42 |
| What percent did the number change by? |
| -20% |
| -30% |
| -50% |
| -10% |
| -60% |
| -24% |
| 10% of 10 is 1 What is the % change if 10 shrinks to 7 |
| What percent did the number change by? |
| 10% |
| -30% |
| -40% |
| 3% |
| -60% |
| 0% |
| 10% of 20 is 2 What is the % change if 20 shrinks to 16 |
| What percent did the number change by? |
| -20% |
| -50% |
| -25% |
| 20% |
| -10% |
| -30% |
| 10% of 70 is 7 What is the % change if 70 shrinks to 49 |
| What percent did the number change by? |
| -10% |
| 27% |
| -60% |
| -30% |
| 21% |
| -50% |
| 10% of 100 is 10 What is the % change if 100 shrinks to 70 |
| What percent did the number change by? |
| -40% |
| 27% |
| -20% |
| -30% |
| -60% |
| 0% |
| 10% of 30 is 3 What is the % change if 30 shrinks to 24 |
| What percent did the number change by? |
| -30% |
| 10% |
| -20% |
| 0% |
| -11% |
| -50% |