smc-4462-40-Word problems percentages

Percentages, SM-Bank 010

The breakdown of Joanna's weekly spending is shown in the sector graph below.

What percentage of Joanna's weekly spending was on entertainment? (2 marks)

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$10\text{%}$

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$\text{Percentage spent on Entertainment}$	$=100-(20+40+10+20)$
	$=10\text{%}$

$\therefore\ \text{Joanna spent } 10\text{% on Entertainment.}$

Zane bought a soccer ball that was on sale at 50% discount.

He paid $19.95 for the soccer ball.

Which amount below is the best estimate of the original price of the soccer ball?

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$A$

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$19.95\approx $20\ $ and $\ 50\text{%}=\dfrac{1}{2}$

$\therefore\ \dfrac{1}{2}\ \times\ \text{Original Price}$	$\approx $20$
$\therefore\ \text{Original Price}$	$\approx 2\times 20$
	$\approx $40$

$\Rightarrow A$

\(\therefore\ \dfrac{1}{2}\ \times\ \text{Original Price}\)	\(\approx $20\)
\(\therefore\ \text{Original Price}\)	\(\approx 2\times 20\)
	\(\approx $40\)

\(\text{Percentage spent on Entertainment}\)	\(=100-(20+40+10+20)\)
	\(=10\text{%}\)