More fraction variants

[CZonin]

Before submitting a new icon request, please confirm the following:

• [X] I have searched all issues to make sure there isn't a request for this icon.
• [X] I have searched the current library to make sure the icon doesn't already exist.
• [X] I understand that brand icons are no longer being added and I can use SimpleIcons for my brand icon needs.
• [X] I only intend to request a single icon (or a few near-identical ones) in this issue.

What would you use this icon for?

There is currently a fraction-one-half in MDI. It would be useful to have more fractions available:

• 1/4
• 3/4
• 1/3
• 2/3

Give us an example of what this icon might look like.

[steodor]

fraction-one-third.zip

[steodor]

fraction-two-thirds.zip

[steodor]

fraction-one-quarter.zip

[steodor]

fraction-three-quarters.zip

[CZonin]

These are great, thanks @steodor !