Răspunsuri

2014-04-27T22:07:15+03:00
30% din 80= 30/100 *80=2400/100=24
45% din 80= 45/100*80= 9/20 *80=720/20=36
25% din 24=25/100*24= 1/4*24= 24/4=6

48% din a= 350
48/100*a=350
48/100=350/a
a=100*350/48
a=729,16%₀

23% din a=46
23/100*a=46
23/100=46/a
a=100*46/23
a=200%

2014-04-27T22:09:06+03:00
A)100% - - -80
30% - - - x
x=30*80/100=24
b)100% - - -80
45%- - - x
x=45*80/100=36
c)100% - - -24
25% - - -x
x=24*25/100=6
d)48% - - - 350
100% - - -x
x=100*350/48=729(aprox)
e)23% - - - 46
100% - - -x
x=100*46/23=200