Percentage Practice Test 6 with solutions

Let the total number be x.
Number of plates = 40% of x = 40x
Remaining items = 60%
So, the number of cups = 30% of (60x) $=\frac{30}{100}\times 60\mathit{x}=18\mathit{x}$
Now, the number of spoons = 50% of (60 - 18)x $=\frac{50}{100}\times 42\mathit{x}=21\mathit{x}$Now 21% of x = 42
$\Rightarrow \frac{21}{100}\times \mathit{x}=42$
$\mathit{x}=200$
So, the number of pieces = 200