This math topic focuses on calculating the percentage change when numbers decrease, specifically using multiples of 10%. It involves determining how much a number has reduced in percentage terms from its original value. The problems require students to understand how to compute percentages and apply this understanding to scenarios where values shrink, comparing new values to original ones to find the percentage decrease. The questions are practical applications of percentage decrease concepts, aimed at building fundamental skills in handling percentages in various contexts.
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 90 is 9
What is the % change if 90 shrinks to 9
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 2)'. Part of a broader unit on 'Percentages - Intro' Learn online: app.mobius.academy/math/units/percentages_intro/ |
| 10% of 90 is 9 What is the % change if 90 shrinks to 0 |
| What percent did the number change by? |
| -100% |
| -76% |
| -130% |
| -88% |
| -91% |
| -110% |
| 10% of 20 is 2 What is the % change if 20 shrinks to 8 |
| What percent did the number change by? |
| -30% |
| -40% |
| -90% |
| -60% |
| -80% |
| -20% |
| 10% of 50 is 5 What is the % change if 50 shrinks to 30 |
| What percent did the number change by? |
| -13% |
| 0% |
| -70% |
| -20% |
| -40% |
| -60% |
| 10% of 90 is 9 What is the % change if 90 shrinks to 9 |
| What percent did the number change by? |
| -70% |
| -90% |
| -80% |
| -110% |
| -120% |
| -117% |
| 10% of 100 is 10 What is the % change if 100 shrinks to 30 |
| What percent did the number change by? |
| -90% |
| -80% |
| -37% |
| -70% |
| -97% |
| -60% |
| 10% of 20 is 2 What is the % change if 20 shrinks to 4 |
| What percent did the number change by? |
| -50% |
| -100% |
| -80% |
| -101% |
| -107% |
| -68% |
| 10% of 30 is 3 What is the % change if 30 shrinks to 18 |
| What percent did the number change by? |
| -60% |
| -70% |
| -49% |
| -7% |
| -40% |
| -50% |