problema con el tamaño de las imagenes

adjunto imagenes 

la primera mide 94 cm de ancho y al guardarse en jpg

la segunda mide 391 cm de ancho 

a continuacion pongo los valores

al intentar poner 100% en porcentaje dice esto:

 y si lo pongo solo en exportar pasa lo mismo:

de antemano, gracias por su ayuda

Hi @carlos molinero, please share your workflow and screenshots, this could be a situation of photoshop only works in even numbers.

"Photoshop works in pixels. There are no half pixels or any other fractions of a pixel, only whole pixels.

20cm at 300pixels per inch requires 20/2.54 *300 = 2362.204 pixels. As said above you can't have part of a pixel so it has to be rounded up or rounded down. Rounding down to 2362 pixels at 300ppi gives 19.99cm. Rounding up to 2363 pixels at 300ppi gives 20.006cm"

- from davescm

Thank you,

Please post a screen capture that includes your export settings.