Question

how many more square must be shaded so that only 30%of the figure unshaded

Answer 1

Step-by-step explanation:

Shaded part= 8

Unshaded part =12

% of unshaded part = 30%

Figure is left unshaded = 20×30/100=6

Answer 2

Answer:

6 squares.

Step-by-step explanation:

Given,

Total squares in the figure = 20,

Shaded squares = 8,

If 30% of the figure is un-shaded,

Then the part of shaded will be 70%,

Let x be the more squares shaded such that 70% part of the figure is shaded,

Then,

$\frac{8+x}{20}=\frac{70}{100}$

$800 + 100x = 1400$

$100x = 600$

$x=6$

Hence, 6 more squares must be shaded.