137x30:100=41,1 euro reducerea de 30%
137-41,1=95,9 euro dupa reducerea de 30%
137x45:100=61,65 reducerea de 45%
137-61,65=75,35 euro dupa reducerea de 45%
137........................................100%
60............................................x %
x=60x100:137=43,795
r; reducerea a fost de 43,795%