Percentage/Examples/20 Per Cent
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Example of Percentage
- $20$ per cent is the same as $0.2$ or $\dfrac 1 5$.
Proof
| \(\ds \text {$20$ per cent}\) | \(=\) | \(\ds 20 \%\) | ||||||||||||
| \(\ds \) | \(=\) | \(\ds 20 / 100\) | Definition of Per Cent | |||||||||||
| \(\ds \) | \(=\) | \(\ds \dfrac 1 5\) | arithmetic | |||||||||||
| \(\ds \) | \(=\) | \(\ds 0.2\) | Definition of Fraction |
$\blacksquare$
Sources
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): per cent (%)
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): per cent (%)