How to calculate for Percentages in Numerical Reasoning Test
- A simple trick,
2. 
For the first image, 30% of 60, it can be easily calculated by multiplying (30 x 60)/100=18
Alternatively, you can multiply, 3 by 6, which results in 18.
Another method is 10% of 60 =
10/100 x 60 = 6
Therefore, 30/100 x 60 = 18.
2.
For the second image, 20% of 130 = (20/100) x 130 = 26
Or, 10/100 x130 = 13,
Therefore, 20/100 x 130 = 26.
From the question above, 65% of 30 = 19.5
The breakdown:
10% of 30 = 3, therefore 60% 0f 30 = 18
5% of 30 = 1.5, adding 60% & 5% = 18 + 1.5 = 19.5
45% of 20 = 9
Solution
(45 x 20)/100 = 9
Note:
Questions like 32% of 50, the values can also be calculated by rotating the figures, 50% of 32
Both questions will give you 16.
Another example is 33% of 20, the values can be rotated like this, 20% of 33, the answer for both questions is 6.6.
–$70 – 30% = (30/100 x $70) = 21
$70 – 21 = $49
The above tips are sure and easy ways to get ready for Percentages in Numerical Reasoning Test.