Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Enroll
45
Download
Percentage - Concepts
312 plays

More
Few 'must know' concepts in Percentage, which every Aspirant should know before he/she sits for the exam.

Niteesh Srivastava
Love Music, the necessity of life!! Puzzle and Chess enthusiast. I believe you can achieve anything if you set your mind on it!!

U
Unacademy user
Sir your lectures helps a lot thank you for your effort.Please make lectures on MACHINE DESIGN for GATE MECHANICAL.Waiting for your positive response.
Will cover in future courses
Thank you sir.
1. Percentage Increase/Decrease

2. Concept of 'By' and To' 'By' refers to the difference and 'To' refers to the final value. Example: The consumption of electricity has been decrease by 40%, this means that the consumption is now 60% of its original value. The consumption of electricity has been decreased to 40%, this means that the consumption is now 40% of its original value.

3. Concept ofBY Due to lower monsoon, the revenue has been decreased by 12.5% compared to last year's 5600 Lakhs. What is the current revenue? 12.5%-1/8 5600 * 1 / 8 700 5600-700 4900 Or, 5600 * [1-1/8 ] Answer 5600 * 7/ 8 4900

4. Due to reduction in petrol prices, Anmol's total journey per month has been increased by 33.33%, from last month's 1500 kms. How much kms does he drive now? 33.33% 1 / 3 Therefore, 1500 * 4/ 3 = 2000 [ 1+1/3 = 4/ 3 ]

5. Concept of TO Due to the distressin the market conditions, the share - Due to the distress in the market conditions, the share prices of XYZ company has been decreased to 90% of its last traded value of 810. What is the new share price? Decreased to 90%, that means the share has been dropped by 1 0%, 10% 1 / 1 0] = 810 * [1-1/10-810 * 9/ 10 = 729

6. Percentage Change: Increase/Decrease Formula: Change in Percentage= Final Value-Initial Value * (100) Initial Value Example: Ford Produced 5000 Cars in year 2015, where as in 2016 the production was 7000 Cars, what is the percentage Increase? = (7000-5000)/ 5000 2000/5000= 2/5= 40%

7. Vimal's expenses for the year 2015 on the laundry was 1100 per month. He claims, after relocating to new city in 2016, he spends only 950 per month on the Laundry. What is the percentage drop in the Laundry expenses? Vimal's expenses for the vear 2015 on the laundry was 1100 per month Initia!Value 1100 * 12-13200 Final Value 950 * 12 11400 Percentage Change - [(11400-13200)/ 13200 ] * 100 [-1800/13200] 100 = 13.64% Drop in Laundry Expenses