This math topic provides practice on calculating the percent change when numbers decrease by specific multiples of 10%. The problems involve finding the percentage decrease from an original number to a new, smaller number. For example, students are asked to determine the percentage decrease when a number like 100 is reduced to 80, or 90 shrink to 63. Each problem gives multiple-choice answers, helping students understand how to compute and recognize percent decreases accurately. This is part of an introduction to understanding percentages.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Percent change in a shrinking number (10% multiples)
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
What percent did the number change by?
30 shrinks to 24
Percent change in a shrinking number (10% multiples) Worksheet
| Math worksheet on 'Percent change in a shrinking number (10% multiples) (Level 1)'. Part of a broader unit on 'Percentages - Intro' Learn online: app.mobius.academy/math/units/percentages_intro/ |
| What percent did the number change by? |
| 30 shrinks to 27 |
| -10% |
| -20% |
| 20% |
| -30% |
| -40% |
| 30% |
| What percent did the number change by? |
| 60 shrinks to 54 |
| -20% |
| -10% |
| 20% |
| -6% |
| -18% |
| -7% |
| What percent did the number change by? |
| 10 shrinks to 8 |
| -10% |
| 0% |
| -20% |
| 10% |
| 20% |
| -26% |
| What percent did the number change by? |
| 100 shrinks to 70 |
| -60% |
| 10% |
| -30% |
| -20% |
| -50% |
| -27% |
| What percent did the number change by? |
| 20 shrinks to 14 |
| -21% |
| -30% |
| 24% |
| 10% |
| -48% |
| -54% |
| What percent did the number change by? |
| 100 shrinks to 80 |
| -12% |
| 20% |
| -50% |
| -20% |
| -40% |
| -10% |
| What percent did the number change by? |
| 50 shrinks to 45 |
| 5% |
| 30% |
| 20% |
| 0% |
| -30% |
| -10% |