It might be possible to answer the question if you stated as a percentage of what!
no . A3 is bigger than A4 .
A4 paper has 210 x 297 mm. You can convert that to inches if you like (divide the numbers by 25.4).
21 by 29.8 cm
210mm x 297mm
8.27" (210 millimeters)
A4 paper size is 8.3in × 11.7in.
European size paper
A4 paper measures 8.27 x 11.69 inches.
Half of A4 is A5.
1mm
Yes
Two full A4 size papers
The size of the paper should be an A4 paper.
A4 paper is exactly half the size of A3, and they both have the same aspect ratio. So A4 --> A3 is an enlargement. Most photocopiers use A4 as standard. You need a larger photocopier to copy onto A3. The photocopier will usually offer A4 --> A3 as an option.
The measurements of a size A4 paper are 11.7 x 8.3 inches or 297 x 210 millimeters. It is just a little bigger than the standard letter size of paper.
No, Australia is one of the few countries in the world that use A3 as their standard format size. Even if it does, A3 and A4 are all part of the A series paper sizes defined by ISO 216.
A3.