Author: PK

PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools. PK lives in New Hampshire with his wife, kids, and dog.
Percent Difference Calculator

Below is a percent difference calculator. Enter a start and an end number and we'll calculate the percentage difference between […]

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Percent Change Calculator: What Was the Change from the Start to Finish?

On this page is a percent change calculator. Enter two numbers and we'll calculate the percentage change to go from […]

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Percent Decrease Calculator: How Much Did it Go Down?

On this page is a percent decrease calculator. Enter your starting amount and a lower ending amount and the tool […]

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Percent Increase Calculator: How Much Did it Grow?

On this page is a percent increase calculator. Enter a starting amount and an ending amount and the tool will […]

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Percent to Fraction Calculator

Below is a percent to fraction calculator. Enter a percentage and the tool will attempt to convert it to the […]

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Fraction to Percent Calculator

Below is a fraction to percent calculator. Enter a fraction and this tool will convert it to a percentage for […]

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The DQYDJ Weekender, 4/05/2020

Hey folks! Welcome back to the Weekender.  Once again, this one will be dominated by COVID thoughts – skip if […]

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Area Calculator: Compute Dimensions of a Circle

Below is a circle area calculator, which will compute the linear dimensions radius, diameter, and circumference if you know the […]

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Radius Calculator: Compute Dimensions of a Circle

Below is a radius calculator, which will compute a circle's diameter, circumference, and area if you know the radius. Do […]

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Diameter Calculator: Compute Dimensions of a Circle

Below is a diameter calculator, which will compute a circle's radius, circumference, and area if you know the diameter. Do […]

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Don't Quit Your Day Job...

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