Resposta :
1. %
25 --- 100
X ---- 24
25*24 = 100X
600 = 100X
X = 600/100
X= 6
--------------------------
2. 102 ----- 85%
x ------- 100%
85x = 10.200
x = 10.200/85
x = 120 reais
--------------------------
3. 15.145 = 2175
2175 ÷ 100= 21,75
145-21,75= 123,25
--------------------------
4. 30%
520 - 364 = 156
156/ 520 = 0,3 = 30%
--------------------------
5. 1500,00 x 15% = 22.500 = 225,00
1500,00 = 225,00 = R$ 1725,00