Question

Question 140 (i)

The pieces of Tangrams have been rearranged to make the given shape.

By observing the given shape, answer the following questions.
What percentage of total has been coloured ?
Red (R) = ___ .

Answer 1

Total coloured shape $=\frac{1}{8}+\frac{1}{8}+\frac{1}{8}+\frac{1}{16}+\frac{1}{16}+\frac{1}{4}+\frac{1}{4}=1$
Red coloured shape $=\frac{1}{8}+\frac{1}{8}+\frac{1}{8}$ [by observation]
$=\frac{1+1+1}{8}=\frac{3}{8}$
Hence, percentage of red coloured $=\frac{Redcolouredshape}{Totalcolouredshape}\times 100\%\frac{\frac{3}{8}}{1}\times 100\%=\frac{3}{8}\times 100\%=37.5\%$