104:
x - 0.32x - 0.4x = 224
0.28x = 224
x = 800
105:
180 / 100 = 1.8 (1%)
117 / 1.8 = 65%
106:
16 / 5 = 3.2 г соли на 100 г раствора
Ответ 3.2%
107:
5.52 - 4.8 = 0.72
0.72 / (4.8/100) = 15%
108:
120 / 100 = 1.2 (1%)
150 / 1.2 = 125
125 - 100 = 25%
109:
150 / 100 = 1.5
120 / 1.5 = 80
100 - 80 = 20%
110:
80 + 10% = 88
88 - 20% = 70.4
80 - 70.4 = 9.6
9.6 / 0.8 = 12% (уменьшилось на 9.6р или 12%)