this is probably basic but it's doing my head in!
8000*4 = 3800*x finding x with cross multiply and divide makes sense...
8000*4 = 3800*x so 32000 = 3800*x so x = 32000/3800 = 8.42105
this method also works, but struggling to see exactly why!
3800/8000 = 4/x so 3800/8000 = 0.475, then 4/0.475 = 8.42105
8000*4 = 3800*x finding x with cross multiply and divide makes sense...
8000*4 = 3800*x so 32000 = 3800*x so x = 32000/3800 = 8.42105
this method also works, but struggling to see exactly why!
3800/8000 = 4/x so 3800/8000 = 0.475, then 4/0.475 = 8.42105