If I-m doing a mockup for a web project that requires css animations that involve scaling objects (via transforms) I have to pull out a calculator or interrupt my workflow by using an app (photoshop) that allows me to scale using percentages

Yes, please add this. It seems absurd that an Adobe product wouldn't have the ability to scale objects by percent. This is basic.

Como dice el titulo estaria muy bien poder poner los tamaños en base a un porcentaje del tamaño total de la mesa de trabajo.
Algo asi como decir Anchura: 60% y que use el 60% del tamaño horizontal de la mesa de trabajo.

I need to scale my items by percentage for responsive design. Thank you for reviewing this feature.
(PS I found there is TransformSession plugin which is enough for my current needs)

I'm trying to develope resposive design both windows and mobiles devices. I could not have option to provide in percentages for the layouts. Please help me out.

any update on this ? seems needed for years now

We really need this functionality. My developers ask me for a prototype showing them percentages, not just px/or/dp...

This is a BASIC feature. Why is this not already part of the tools?!?!

Please add this. It's an essential feature in a design app.

It would be nice if all numerical fields could be input as px or percentages independently of each other. Width, height, padding, margins (if you ever get around to adding them), font (em), etc.

For app design developers prefer to work in percentages instead of pixels. PLEASE add this option.

Yes, please quickly :(

SOLVED-ish!

You can edit the field with a function!
if the width is 500 and you edit to 500/2 it does the math and gives you 250.

Yes, agreed. Need it very much please!

yes please.

I assume by this you are asking for the ability to scale an object (or group) by a percentage?

It would be pretty good to have this. In certain development environments, it will be pretty helpful. Zeppelin has a percentage relative to parent on their app.

Developers often ask me.
For APP use percentage values.
We really need.

like this link
https://support.zeplin.io/en/articles/461743-working-with-percentage-values

agree!!! please make using a percent to set the size

Yes, agree. I definitely need this!!!