RRB Group D / RPF Constable Exam  >  RRB Group D / RPF Constable Videos  >  Railways Exam Preparation (in Hindi)  >  Railway Group D/ALP Exam || How to use percentage in calculations PART - 3

Railway Group D/ALP Exam || How to use percentage in calculations PART - 3 Video Lecture | Railways Exam Preparation (in Hindi) - RRB Group D / RPF Constable

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FAQs on Railway Group D/ALP Exam -- How to use percentage in calculations PART - 3 Video Lecture - Railways Exam Preparation (in Hindi) - RRB Group D / RPF Constable

1. How do I calculate percentage increase or decrease?
Ans. To calculate the percentage increase or decrease, you need to follow these steps: 1. Find the difference between the new value and the original value. 2. Divide the difference by the original value. 3. Multiply the result by 100 to get the percentage. For example, if the original value is 50 and the new value is 70, the difference is 70 - 50 = 20. Divide 20 by 50 to get 0.4. Multiply 0.4 by 100 to get the percentage increase of 40%.
2. How can I calculate a percentage of a quantity?
Ans. To calculate a percentage of a quantity, follow these steps: 1. Convert the percentage to a decimal by dividing it by 100. 2. Multiply the decimal by the quantity to get the result. For example, if you want to calculate 20% of 200, divide 20 by 100 to get 0.2. Multiply 0.2 by 200 to get the result of 40.
3. What is the formula to find the original value after a percentage increase or decrease?
Ans. To find the original value after a percentage increase or decrease, use the following formula: Original Value = Final Value / (1 + (Percentage / 100)) For example, if the final value is 120 after a 20% increase, the original value can be calculated as 120 / (1 + (20 / 100)) = 100.
4. How can I calculate the percentage difference between two values?
Ans. To calculate the percentage difference between two values, follow these steps: 1. Find the difference between the two values. 2. Divide the difference by the average of the two values. 3. Multiply the result by 100 to get the percentage. For example, if the two values are 80 and 100, the difference is 100 - 80 = 20. The average is (80 + 100) / 2 = 90. Divide 20 by 90 to get 0.2222. Multiply 0.2222 by 100 to get the percentage difference of 22.22%.
5. How can I calculate the percentage increase between two values?
Ans. To calculate the percentage increase between two values, follow these steps: 1. Find the difference between the two values. 2. Divide the difference by the original value. 3. Multiply the result by 100 to get the percentage. For example, if the original value is 50 and the new value is 70, the difference is 70 - 50 = 20. Divide 20 by 50 to get 0.4. Multiply 0.4 by 100 to get the percentage increase of 40%.
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