# How do I work out a new constrained scale height based on a new width?

This is super simple I guess but my mind has gone blank.

I have these dimensions below, and I am trying to scale this rectangle to 610 wide

Width 560 Height 315

From these figures, how do I work out the percentage to scale the height so the rectangle is still at the same aspect ratio?

Thanks

Think I got it...

560 / 100 = 5.6

610 / 5.6 = 108.92

Answer 108.92%

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homework should not be used as a standalone tag; see here. It is also explained in the tag-excerpt, which you can see when you hover with your mouse over the tag, and in the tag-wiki. –  Martin Sleziak Jul 24 '12 at 9:52
if i'm honest i was struggling to find a tag to suit my question –  Joshc Jul 24 '12 at 9:54

## 1 Answer

Since $\frac{610}{560} \doteq 1.089$, you have to scale by approximately $8.9$% (from 100% to 108.9%).

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That is so much simpler. Thanks –  Joshc Jul 24 '12 at 10:03