Building · Proportion fill

Percentages

Out of 100 — a fill meter for “how much of the whole.”

Interactive visual

35% of 80 = 28

Percent means “per hundred.” The fill shows how much of the strip you take.

35%100

0255075100

Percent35%Of this number80

Bridge: 35% → 0.35 → 0.35 × 80 = 28

Best ways to learn this

Dual coding
Pair every idea with a picture, diagram, or motion.
Words and visuals use different memory channels. Together they stick far longer than either alone.
Worked examples first
Study a solved path before trying blanks yourself.
Beginners overload working memory when inventing and checking at once. Watching a clear path first reduces that load.
Spaced retrieval
Recall the idea tomorrow and next week — not only today.
Forgetting a little, then retrieving, strengthens the pathway. Cramming feels good, then fades.

Tip: Find 10% first (divide by 10), then build up to the percent you need.

Memory check

Due now

20% off, then 20% more off, equals how much off?

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