Adobe Illustrator percent scaling for given scaled ratio chart

Hello fellow Adobe community, I don't normally post, but I do search regularly on these forums for help finding answers/solutions. Since I had a hard time finding the answer to this, and took me awhile to figure out, as I struggle with the math side of my brain. Time for me to give back & share my findings & hope this helps others.

When given a vehicle template or architecture plans that have a scale ratio, and you need to scale it back up to size with illustrators scale tool & have to figure out what percent to scale it up. Or you are scaling something down with illustrator & need to note it in your plans but unsure of the proper ratio term for the percentage you used to scale it down. Here is the answer.

1:10 - 10% scale down - 1000% scale up

1:2 - 50% scale down - 200% scale up

3:20 - 15% scale down - 666.67% scale up

1:5 - 20% scale down - 500%scale up

1:4- - 25% scale down - 400% scale up

3:10 - 30% scale down - 333.33% scale up

2:5 - 40% scale down - 250% scale up

3:5 - 60% scale down - 166.67% scale up

7:10 - 70% scale down - 142.86% scale up

3:4 - 75% scale down - 133.33% scale up

4:5 - 80% scale down - 125% scale up

9:10 - 90% scale down - 111.11% scale up

Enjoy!