Math Interactive

The Proportion Method

Master percentages by setting up the proportion equation and solving for the unknown value x.

Core Proportion Formula

Part (is)
Whole (of)
=
%
100
Part: The portion or partial amount
Whole: The total or original 100% base
%: The percent rate out of 100

Friendly numbers (e.g., 10%, 25%, 50%) & direct questions.

Score: 0 / 0
Mixed • Easy
Question 1 Find the Part

What is 25% of 80?

Please fill in all fields and place 'x' in the unknown position.

1 Set Up the Proportion Equation

Type numbers or tap Set x for the unknown
Part
Whole
=
Percent (%)
100
Fixed Base
Base 100

2 Solve for x

Step-by-Step Solution & Explanation

Correct Setup:
=
100
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