Răspuns:
1)
a)18/24
b)15/25=3/5
c)10/100 x 360=1/10 x 360=360/10=36
2)
a)25 % din 50% din 1000
50 % din 1000 :50/100 x 1000=1/2 x 1000=1000/2=500
25% din 500 :25/100 x 500=1/2 x 500=500/2=250
b)2/x=5/15=>5x=30=>x=30/5=6
c)2500-25/100 x 2500=2500-1/4 x 2500=2500-2500/4=2500-626=1875
