When it comes to CSS it takes notice of percentages down to 2 decimal places and then stops. So you would be able to get 33.34% but not 33.3457% for use in your keyframes
Related links on SO:
Is it allowed to use any decimal value in CSS keyframe animations?
Can you use more than a whole number with @keyframe percents?
Yes, but you can only keep up to 2 decimal points.
Related links on SO:
Is it allowed to use any decimal value in CSS keyframe animations?
Can you use more than a whole number with @keyframe percents?