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9 (a) Shade 3/4 of this grid. (b) Work out 15% of 80.

Mathematics

ScanSolve AI Answer

Answer

b

12\text{12}

Step-by-step solution

6 steps

Part a· 3 steps

  1. Count the total number of squares in the grid.

    The grid has 4 rows and 4 columns, so the total number of squares is 4×4=164 \times 4 = 16.

  2. Calculate the number of squares to shade.

    To shade 34\frac{3}{4} of the grid, we calculate:

    34×16=3×164=3×4=12\frac{3}{4} \times 16 = 3 \times \frac{16}{4} = 3 \times 4 = 12

  3. State the number of squares to shade.

    You should shade 12 squares in the grid.

Part b

12\text{12}

  1. Convert the percentage to a decimal.

    15%=15100=0.1515\% = \frac{15}{100} = 0.15

  2. Multiply the decimal by the given number.

    0.15×800.15 \times 80

  3. Calculate the product.

    0.15×80=120.15 \times 80 = 12

    The answer is 12\boxed{\text{12}}.

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