Ratio Calculator

Simplify a ratio or solve for a missing value.

Overview

Simplifies mathematical ratios (A:B) to their lowest terms using the Greatest Common Divisor and solves for missing proportional values (A:B = C:D).

Formula & Calculation Method

Simplified Ratio = (A / GCD(A, B)) : (B / GCD(A, B)) | Proportions: D = (B × C) / A

Reduces terms by dividing by their greatest common factor and solves cross-multiplication equations.

Worked Example: Simplifying the Ratio 48:64

Inputs: Ratio A = 48 | Ratio B = 64

  • Find Greatest Common Divisor: GCD(48, 64) = 16
  • Divide first term: 48 / 16 = 3
  • Divide second term: 64 / 16 = 4
  • Simplified ratio = 3:4

Summary: Original Ratio = 48:64 | Simplified = 3:4 | Decimal Ratio = 0.75

Common Use Cases

  • Culinary Recipe Scaling: Scale ingredient recipe quantities up or down while maintaining exact taste proportions.
  • Graphic Design & Photography: Maintain exact image aspect ratios when resizing banners and thumbnail graphics.
  • Financial Statement Analysis: Compute debt-to-equity and current liquidity ratios for corporate balance sheets.

Frequently Asked Questions

What is the difference between a ratio and a proportion?

A ratio compares two quantities (A:B); a proportion is an equation stating that two ratios are equal (A:B = C:D).

How do I convert a ratio to a percentage?

Add the ratio parts together to find the whole (A + B), then calculate [A / (A + B)] × 100.

What does scaling a ratio mean?

Multiplying or dividing all terms in the ratio by the same non-zero number to expand or shrink quantities proportionately.

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