Teddy paid R150 for a pair of shoes which originally cost R500. What percentage discount did she get?

2.1

Step 1: Write the sum.
$\frac{1}{2} + \frac{1}{4} + \frac{1}{8}$

Step 2: Convert to common denominator 8.
$\frac{1}{2} = \frac{4}{8}$
$\frac{1}{4} = \frac{2}{8}$
$\frac{1}{8} = \frac{1}{8}$

Step 3: Add the fractions.
$\frac{4}{8} + \frac{2}{8} + \frac{1}{8} = \frac{7}{8}$

Final answer: $\frac{7}{8}$
\dfrac{7{8}}

2.2

Step 1: Calculate $\left( \frac{2}{3} \right)^2$.
$\left( \frac{2}{3} \right)^2 = \frac{4}{9}$

Step 2: Subtract $\frac{2}{9}$.
$\frac{4}{9} - \frac{2}{9}$

Step 3: Simplify.
$\frac{4 - 2}{9} = \frac{2}{9}$

Final answer: $\frac{2}{9}$
\dfrac{2{9}}

2.3

Step 1: Find the discount amount.
Original price: R50
Paid: R49
Discount: R50 - R49 = R1

Step 2: Percentage discount formula.
$\frac{discount}{original price} \times 100\%$

Step 3: Substitute values.
$\frac{R1}{R50} \times 100\%$

Step 4: Simplify.
$\frac{1}{50} \times 100\% = 2\%$

Final answer: 2%
2%