Răspuns :
5400-x%*5400=4860
5400-4860=5400x/100
540=54x
x=10%
Verificare;
100%-10%=90%
90/100*5400=4860
5400-4860=5400x/100
540=54x
x=10%
Verificare;
100%-10%=90%
90/100*5400=4860
5400-4860=x=540
540................ x %
5400..............100 %
x=540·100/5400=54000/5400=10%
540................ x %
5400..............100 %
x=540·100/5400=54000/5400=10%