Learning goals
- Percent is a rate out of 100.
- A hundredths grid turns percent into visible area.
- The same shaded amount can be named as a fraction, decimal, or percent.
Percent Grid Lab
Percent means per 100
Slide across a hundred-grid and watch percent, fraction, and decimal names stay connected.
What this game shows · Percent as Per-Hundred
Percent means "per 100." A 10 × 10 grid is 100 cells, so shading 35 of them shows 35% — and the same shaded region is also 35/100 and 0.35. This game keeps the three forms locked in sync as you slide.
- %
- a rate out of 100; "per cent" = "per hundred."
- 35/100
- the same as 35% — a fraction with denominator 100.
- 0.35
- the decimal form — same value, three notations.
Aligned with CCSS 6.RP.A.3 (use ratio reasoning to solve real-world problems involving percent).
Percent grid
A percent is a count out of 100 equal cells.
35%
35% = 35/100 = 0.35
Ratio and percent model
Who this demo helps, and where to practice next
Percent Grid Lab is built for students who need multiplicative comparison before cross-multiplication or percent shortcuts. It gives the page a clear search purpose: learn the model, manipulate it, then continue into the matching grade-level practice.
Percent Grid Lab helps when a student can copy a procedure but cannot explain why it works. The demo slows the idea down into a visible model before sending the learner to guided missions.
How to play
- 1 Keep the ratio relationship visible while the numbers scale.
- 2 Check the total, unit rate, or percent label before calculating.
- 3 Use the related Grade 6 topics to transfer the model into word problems.
Continue with guided practice
FAQ
Tap to expand Percent, on a grid.
01 Why does percent mean "per 100"? Per centum
Latin "per centum" — for each hundred. So 35% means 35 out of every 100 units. The 10 × 10 grid makes that literal.
02 How are percent, fraction, and decimal connected? 3 forms
They are three names for one ratio. 35% = 35/100 = 0.35. Move the decimal two places left to convert percent to decimal.
03 How do you find a percent of a number quickly? 10% / 1% trick
10% is "shift the decimal one left." 1% is "shift two left." Multiply or combine these for any percent — 25% of 80 = (10 + 10 + 5)% of 80 = 8 + 8 + 4 = 20.
04 Which grade is this game for? Grades 5–6
Grades 5–6, aligned with CCSS 6.RP.A.3. Foundation for tax, tip, and discount problems in Grade 7.