Home / iGCSE Mathematics (0580) : C1.13 Use a calculator efficiently. iGCSE Style Questions Paper 1

iGCSE Mathematics (0580) : C1.13 Use a calculator efficiently. iGCSE Style Questions Paper 1

Question

(a) Shade $\frac{2}{9}$ of this shape.

(b) Write $\frac{2}{9}$ as a percentage.

▶️ Answer/Explanation
Solution

(a) Ans: 8 squares shaded

The grid has 6×6 = 36 squares total. To find $\frac{2}{9}$ of 36, we calculate $\frac{2}{9} × 36 = 8$. Therefore, any 8 squares should be shaded to represent the fraction.

(b) Ans: 22.2% or 22.22…%

To convert $\frac{2}{9}$ to percentage, divide 2 by 9 to get approximately 0.2222, then multiply by 100 to get 22.22%.

Question

Complete the table.

▶️ Answer/Explanation
Solution

Ans:

1. \(\frac{3}{4}\) as a percentage:

Multiply \(\frac{3}{4}\) by 100: \(\frac{3}{4} \times 100 = 75\%\).

2. \(0.2\) as a fraction:

Write \(0.2\) as \(\frac{2}{10}\) and simplify: \(\frac{2}{10} = \frac{1}{5}\).

3. \(\frac{2}{25}\) as a decimal:

Divide \(2\) by \(25\): \(2 \div 25 = 0.08\).

The completed table values are:

  • \(\frac{3}{4} = 75\%\)
  • \(0.2 = \frac{1}{5}\)
  • \(\frac{2}{25} = 0.08\)
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