Toate se rezolva la fel.
a)
50/100 * x = 42
0,5x = 42 => x = 84
b)
10/100 * x = 20
0,1x = 20 => x = 200
c)
25/100 * x = 23
0,25 x = 23
x = 92
d)
40/100 * x = 25
0,4x = 25
x = 25/0,4 = 62,5
e)
80/100 * x = 35
0,8x = 35
x = 35/0,8 = 43,75
f)
24/100 * x = 61
0,24x = 61
x = 61/0,24 = 254,17