Math · Stage 5
Understand percentage as 'out of 100' and find a percentage of a quantity
Per-cent means 'out of 100'. Start with the two friendly percents — 10% (divide by 10) and 50% (halve) — then BUILD UP to any percent by stacking and halving those pieces.
✦ Math📘 Stage 5 · S5⏱ ~12 min🧒 Ages 9–10★ Free to start
I can understand percentage as 'out of 100' and find a percentage of a quantity using friendly percents (10%, 50%) and building up.
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Kavi's Hundred Square 💯
"Per-cent means out of 100," hoots Kavi, holding up a square cut into 100 tiny tiles. "So 50% is 50 tiles out of 100 — that's half. And 10% is 10 tiles — one tenth. Once I can find 10% and 50%, I can build up to any percent: 30% is just three 10%s! 💯"
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What your child will learn
1A whole is 100% — ten equal partsA whole thing is 100% — that means 100 out of 100. Split the whole bar into 10 equal parts. Each part is 10 out of 100, which we write 10%. Tap parts to shade them: one part is 10%, five parts is 50%.
210% → divide by 10 · 50% → halveTwo percents are so friendly you can do them in your head. 10% of a quantity: just divide by 10. 50% of a quantity: just halve it. Tap each card.
3Build any percent from 10%To find a percent that is NOT 10% or 50%, build it up from pieces you know. First find 10%, then stack it. 10% of 40 is 4, so 20% = 4 + 4 = 8 and 30% = 4 + 4 + 4 = 12. For 5%, take half of 10%. For 25%, take half of 50%.
4Divide by 10, or halve?
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A peek inside
Find 50% of 18 🍎.
50% means half → 18 ÷ 2 = 9
Try this at home: Friendly halve: 50% of 60 = __
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 5 · S5 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.