A 1 84 1*594

A2 594*420

A3 420*297

A4 297*2 10

B0 1030* 1456

B 1 728* 1030

B2 5 15*728

B3 364*5 15

B4 257*364

B5 182*257

Calculation method:

When scaling 50%, the length and width are reduced by 50% at the same time, that is, the paper used is reduced by 25%.

My printer shows:

70% reduction from A3 to A4;

A4 to B5 decreased by 86%;

B5 to A4 are all enlarged by 1 15%.

I am so sleepy that I have to go to bed.