ByteBuster Tools

Free Percentage Calculator

Instant Client-Side Arithmetic

Proportion Check

What is %
of ?

Result

0

Ideal for calculating tips or precise tax amounts.

Fraction to Percent

is what %
of ?

Result

0%

Ideal for grading tests or finding portfolio weight.

Percentage Change

From
To

Change

0%

Ideal for tracking investment growth or markdowns.

How This Works & Educational Guide

What is a Percentage Calculator? "Percent" literally translates to "per 100." A percentage calculator converts complex fractions and proportional changes into this easily understood standard format. It is an essential tool for retail markdowns, financial reporting, and daily budgeting.

How to use the three tools:

  • Proportion Check: Use this when you know the total amount and the percentage rate, and want to find the exact cut. (e.g., Finding a 20% tip on a $150 restaurant bill equals $30).
  • Fraction to Percent: Use this when you have two numbers and need the ratio. (e.g., You scored 45 points out of a possible 60 on a test. This calculator reveals your grade is 75%).
  • Percentage Change: Use this to find growth or decay over time. Enter the old price in "From" and the new price in "To". The system will automatically color-code the result green for an increase or red for a decrease.

Why ByteBuster is Different (The Architecture): Standard utility sites require you to click a "Calculate" button, which pings a server, reloads the page, and shows you an ad. ByteBuster utilizes instantaneous local JavaScript arrays. The moment you type a number, your device's local memory cross-multiplies the result with zero latency and zero tracking.