To get a percentage in any everyday situation, use this core idea:

Percentage = (part ÷ whole) × 100

For example, if you scored 45 marks out of 60, then your percentage is (45÷60)×100=75%(45÷60)×100=75%(45÷60)×100=75%.

Basic formula (the main thing)

  • Formula: Percentage = (Value ÷ Total Value) × 100.
  • “Value” (or part) is the amount you care about.
  • “Total Value” (or whole) is the full amount you’re comparing against.

Example 1 (marks):
You got 18 out of 30 in a test.

  • Part = 18
  • Whole = 30
  • Percentage = (18÷30)×100=60%(18÷30)×100=60%(18÷30)×100=60%.

Example 2 (apples):
You have 50 apples, 20 are red.

  • Part = 20
  • Whole = 50
  • Percentage = (20÷50)×100=40%(20÷50)×100=40%(20÷50)×100=40%.

Step‑by‑step method

  1. Identify the part.
    This is the amount you’re focusing on (marks obtained, number of items, money spent, etc.).
  1. Identify the whole.
    This is the total possible or total available.
  1. Divide part by whole.
    This gives a decimal (for example, 0.4).
  1. Multiply by 100.
    Attach the percent sign (%) to get your percentage.

Quick check: A percentage should be between 0 and 100 in normal “part of a whole” problems.

Common “how to get percentage” cases

1. Percentage of marks

  • Formula: \text{Marks %}=(\text{Marks obtained}÷\text{Total marks})×100.
  • Example: 525 out of 600 → (525÷600)×100=87.5%.

2. Percentage of people/items

  • Example: In a class there are 26 boys and 24 girls (total 50 students).
    Percentage of boys = (26÷50)×100=52%.

3. Percentage change (increase or decrease)

Sometimes “how to get percentage” means “how much did something grow or drop in percent?”.

  • Formula:
    \text{Percentage change}=\dfrac{\text{New}-\text{Old}}{\text{Old}}×100.
  • If result > 0 → percentage increase.
  • If result < 0 → percentage decrease.

Handy mental tricks

These ideas often appear in forum discussions and basic math guides:

  • 10% of a number : Just move the decimal one place left.
    • 10% of 250 = 25.
  • 5% of a number : Find 10%, then halve it.
    • 10% of 240 = 24 → 5% = 12.
  • 25% of a number : Quarter it (divide by 4).
    • 25% of 300 = 75.
  • n% of m = m% of n :
    • 40% of 20 = 20% of 40 = 8.

These tricks match what many teachers and explainer videos use to make percentages easier to do in your head.

If you don’t want to calculate by hand

There are many simple online percentage calculators where you just enter the numbers:

  • Sites let you type “part” and “whole” and they show the percentage.
  • Some tools also compute “what percent is A of B” or “what is X% of Y” instantly.

These are useful when numbers get large or you want to double‑check your math.

Mini recap (TL;DR)

  • To get a percentage , always think: part ÷ whole × 100.
  • Use this for marks, money, items, and changes (with the change formula for increases/decreases).
  • Mental shortcuts (10%, 5%, 25%) and online calculators can make the process faster and more comfortable.

If you tell me a specific example (like “I got 37 out of 50” or “price went from 120 to 150”), I can walk you through that exact percentage step by step.