.calculator-wrapper {
font-family: sans-serif;
max-width: 600px;
margin: 20px auto;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
background-color: #f9f9f9;
}
.calculator-input h2, .calculator-result h3 {
text-align: center;
margin-bottom: 20px;
color: #333;
}
.calculator-input p {
margin-bottom: 20px;
line-height: 1.5;
color: #555;
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: bold;
color: #444;
}
.input-group input[type="number"] {
width: calc(100% – 22px);
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
}
.calculator-wrapper button {
display: block;
width: 100%;
padding: 10px 15px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
}
.calculator-wrapper button:hover {
background-color: #0056b3;
}
#result {
margin-top: 20px;
padding: 15px;
background-color: #e9ecef;
border: 1px solid #ced4da;
border-radius: 4px;
text-align: center;
font-size: 1.2rem;
font-weight: bold;
color: #007bff;
}
function calculatePercentageChange() {
var initialValue = parseFloat(document.getElementById("initialValue").value);
var finalValue = parseFloat(document.getElementById("finalValue").value);
var resultDiv = document.getElementById("result");
if (isNaN(initialValue) || isNaN(finalValue)) {
resultDiv.textContent = "Please enter valid numbers for both values.";
return;
}
if (initialValue === 0) {
resultDiv.textContent = "Initial value cannot be zero for percentage change calculation.";
return;
}
var change = finalValue – initialValue;
var percentageChange = (change / initialValue) * 100;
var resultText;
if (percentageChange > 0) {
resultText = percentageChange.toFixed(2) + "% increase";
} else if (percentageChange < 0) {
resultText = Math.abs(percentageChange).toFixed(2) + "% decrease";
} else {
resultText = "0% change (no change)";
}
resultDiv.textContent = resultText;
}