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Government Exams & Civil Services · English · 16:9 · 4:00

Percentages: concepts, worked examples and practice

Watch the complete 24-clip assembly supplied for this percentages lesson: meaning and fractions, percentage calculations, percentage increase, successive changes, percentage points, practice and recap. It is shared quantitative-foundation teaching, not the complete Government Exams & Civil Services syllabus or a separate examination-specific lesson for every programme.

Use these correct written steps alongside the video

The source footage is preserved. Some generated board graphics contain incorrect numbers, malformed equations, unrelated labels or UGC NET wording. In particular, do not copy the extra negative sign in the increase example or the stray algebra in the final practice questions. These written calculations are corrections, not a transcript of those graphics.

Meaning and percentage of a quantity

25% = 25 ÷ 100 = 1/4.

20% of 250 = (20 ÷ 100) × 250 = 50.

Alternatively, 10% of 250 = 25, so 20% = 2 × 25 = 50.

Finding a percentage

40 correct answers out of 50:

(40 ÷ 50) × 100 = 80%.

The denominator is the total number of questions, 50.

Percentage increase

250 − 200 = 50, not −50.

(50 ÷ 200) × 100 = 25%.

Divide the increase by the original value, 200.

Successive changes

100 × 1.20 = 120.

20% of 120 = 24; 120 − 24 = 96.

The net change is a 4% decrease, because the two changes use different bases.

Percentage points and relative increase

A rate changing from 40% to 50% increases by 10 percentage points.

Relative increase = (10 ÷ 40) × 100 = 25%.

These measure different things.

Practice answers

15% of 200 = (15 ÷ 100) × 200 = 30.

80 to 100: ((100 − 80) ÷ 80) × 100 = 25%.

10% discount on 500: 500 − 50 = 450.

AI-generated presenter and illustrative board visuals. All 24 ten-second source clips are included, with their original scene changes; this is not a single continuous camera take. The video does not establish affiliation with an examining body. Consult your selected programme’s published curriculum and reading material for examination-specific preparation.

Government Exams & Civil Services

UPSSSC PET

Preparation support for UPSSSC PET, with syllabus-based topic learning, practice, revision and mock-test strategy. Current notification, eligibility, dates and official pattern must be verified from the conducting authority.

Watch the percentages lesson · 24 clips · 4:00 →Watch the percentage lesson & enrolment invitation · 2:00 →

Delivery: Online LMS learning support
Access: 9 months course access

Full course fee

₹2,999.00

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Government Exams & Civil Services

Uttarakhand PCS

Preparation pathway for Uttarakhand state civil services, combining state-specific topics and general competitive exam foundations.

State PSC & Civil Services

General Studies · Uttarakhand GK · Current Affairs · Aptitude

Watch this programme’s specific overview →

Watch the percentages lesson · 24 clips · 4:00 →Watch the percentage lesson & enrolment invitation · 2:00 →

Delivery: Online LMS learning support
Access: 9 months course access

Full course fee

₹9,999.00

View course 1-Day Free Trial

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Government Exams & Civil Services

West Bengal Civil Service

Preparation for West Bengal civil services with emphasis on state governance, current affairs and exam-specific writing practice.

State PSC & Civil Services

General Studies · West Bengal GK · Current Affairs · Aptitude

Watch this programme’s specific overview →

Watch the percentages lesson · 24 clips · 4:00 →Watch the percentage lesson & enrolment invitation · 2:00 →

Delivery: Online LMS learning support
Access: 9 months course access

Full course fee

₹9,999.00

View course 1-Day Free Trial

Fee & checkout Admission enquiry Sample invoice

Academic and professional-examination programmes provide learning support. The underlying degree, examination eligibility or professional qualification is governed by the relevant institution or examining body. Review the terms and refund policy before payment.