Question

China issued the largest stamp ever, 210 mm long and 65 mm wide. Find the ratio of length to width.

Answer 1

Since its ratio of length to width
we put it like this.
210/65. This could be an answer but it rough to put it like this so we divide the ratio.
3.203/1 is also the simplified answer.
For 1mm inch width the stamp grows 3.203mm in height.