This Bankers Tutorial article is independent educational material. Examples are illustrative, and changing rules or examination requirements should be checked at the official source.
01 / UNDERSTANDING
Understand the idea
A savings goal, sales target or service-volume comparison all use relative change. Correctly naming the base makes the result understandable to someone who did not see the calculation.
02 / UNDERSTANDING
The concept in context
A percentage change measures a difference relative to a specified starting value. Divide the change by that base, then multiply by 100. The words more than, less than and compared with identify the reference quantity; overlooking those words can turn correct arithmetic into an answer to the wrong question.
Successive changes act on changing bases. A rise followed by a fall of the same percentage does not usually restore the original amount. Using a starting value of 100 makes that mechanism visible, while multiplication by successive factors provides a reliable method when the initial quantity is supplied.
03 / UNDERSTANDING
A worked learning case
Original educational case. A practice branch has 200 new accounts in one month. Openings rise by 20% to 240, then fall by 20% to 192. The second change removes 48 accounts rather than the first increase of 40. The final figure is eight below the starting value, a net decrease of 4%, despite the equal percentage labels.
ORIGINAL EDUCATIONAL PRACTICE
Try it before you check.
Original practice: A quantity rises from 80 to 100. What is the percentage increase?
Show the answer and reasoning
25%.
The increase is 20 and the starting base is 80. Dividing 20 by 80 gives one quarter, or 25%. Dividing by the final value of 100 would instead answer what proportion the increase represents of the final amount, which is a different comparison from percentage growth.
Two traps to watch for.
- Using the final value as the growth denominator.
- Adding successive percentages as if their bases never change.
YOUR TOPIC-SPECIFIC LEARNING MAP
Turn understanding into practice
Circle the comparison base.
Convert each change into a multiplier.
Check a result using an initial value of 100.
Explain the idea, apply it to a new situation, then check what changed in your reasoning.
BANKERS TUTORIAL · SOURCE NOTES
Keep the source alongside your notes.
Official links provide subject context and authoritative reference material. This guide’s explanation, scenario and question are original Bankers Tutorial learning content.
- sbi.bank.in https://sbi.bank.in/web/careers/current-openings
- sbi.bank.in https://sbi.bank.in/webfiles/uploads/files_2627/09/SBI_JA-Customer_Support_Sales-IH_Pre-2026-27_Eng.pdf
For SBI preparation, check the current official notice before relying on changing dates, rules or examination requirements.
