Check if the value is greater than or equal to the nearest lowest 0.05 in JavaScript

I want to check whether a decimal value is greater than or equal to the nearest low 0.05 value

Example

Value | Expected Nearest 0.05 value 
11.10 |    11.05           
11.11 |    11.10           
11.12 |    11.10           
11.13 |    11.10           
11.14 |    11.10           
11.15 |    11.10           

I tried using the formula

parseFloat((Math.floor(value * 20) / 20).toFixed(2))

But it fails for 11.10 and 11.15. Using the above formula I get the output same as the value but the expected values are different. Which formula should I use to fix the above test cases.

>Solution :

You could take an offset and take a multiple floored value.

const format = f => Math.floor((f - 0.01) * 20) / 20;

console.log([11.10, 11.11, 11.12, 11.13, 11.14, 11.15, 11.16, 11.17, 11.18, 11.19].map(format));

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