There are lots of videos on YouTube on how to do it I’m not completely sure so I don’t want to tell you something false
25% reduced
you take 337.50 divide by 450 which gives you .75
so you take 100% minus 75% and you get 25%
you can check the work by taking 450 time .25 which gives you 112.5 . and subtract that from 450 you'll end up with 337.50
I don’t know spanish sorry
Can you give more information?
The first operation performed while evaluating would be to do the parenthesis