calculating FD and gear ratios

[5e colin]

hey lads can some1 calculate the final drive 67theet on the diff and 18 theet on the output shaft

and 5th gear 38theet on the input shaft and 31 theet on the out put shaft

i have no idea how to calculate this ???????

[richardc9052]

3.72- final drive
0.816- 5th

[AdamB]

Driven / Driver

[5e colin]

chers richard going to get back on the lsd 1s to to compare

thanks adam so input shaft is driven gear

and output driver gear ???