Răspuns:
Explicație pas cu pas:
a, b, c = numerele
S = suma
a/S(25/100) = b/S(20/100) = c/S(15/100)
a/25 = b/20 = c/15
b = 20a/25 = 4a/5
c = 15a/25 = 3a/5
a + b + c = S
a + 4a/5 + 3a/5 = S
5a/5 + 4a/5 + 3a/5 = S
12a/5 = S
a = S*5/12
b = S*5/12*4/5 = S*1/3
c = S*5/12*3/5 = S*1/4