You’re more correct than Kaslin, however I think that you’re off a little also- the percentage of change must be measured against the original value- as in 51-46=5. 5/51=9.8%. In other words, if you have $100, and lose $20, then you’re down 20%- 20/100=0.20.
Well I’ll settle for 9.8% as opposed to 5%