📈 Percentage Change Calculator

Calculate percentage increase or decrease between numbers.

About This Tool

Calculate percentage increase or decrease between numbers.

How to Use

Enter or paste your data in the input fields above
Results update instantly - all processing in your browser
100% free with no signup or account required

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function initTool() { document.getElementById('tool-app').innerHTML = '

原值: 新值:

'; } function doIt() { var oldV = parseFloat(document.getElementById('oldV').value), newV = parseFloat(document.getElementById('newV').value); if (isNaN(oldV)||isNaN(newV)) { document.getElementById('out').textContent='请输入有效数字'; return; } var change = ((newV-oldV)/oldV)*100; document.getElementById('out').innerHTML = '

'+(change>=0?'+':'')+change.toFixed(2)+'%

变化百分比

'; } window.addEventListener('DOMContentLoaded', initTool); n

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