RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including percentize. Try it out:
var percentize = require('percentize');
let percents = percentize([55.755814,37.617635, 1]);
console.log(percents);
percents = percentize([55.755814,37.617635, 9], 9);
console.log(percents);
percents = percentize([55.755814,37.617635, 5, 33], 5);
console.log(percents);
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awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
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