Help! Reduce 70MB PDF to 20MB????

[Afruitbat]

I need to a reduce a 70MB Pdf to 20MB. It's multiple pages with vector and raster graphics so it's a heavy file.....is there any way to do this??? I've already tried exporting as JPG and turning it into a PDF and it was 5x bigger. Help!!!!  

[Kevin Stohlmeyer]

@Afruitbat Have you tried saving as reduced size PDF? You could also use the Redact tool to remove hidden information/ metadata to reduce size.