js convert string to float

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var number = parseFloat('2.5cm'); // centimeters (cm)
console.log(number === 2.5); // true

var number = parseFloat('2.5in'); // inches (in)
console.log(number === 2.5); // true

var number = parseFloat('2.5%'); // percentages (%)
console.log(number === 2.5); // true