3) 25% от 160
160 * \frac{25}{100}
100
25
= 160 * 0,25 = 40
6) 75% от 1000
1000 * \frac{75}{100}
100
75
= 1000 * 0,75 = 750
1) 10% от 50
50 * \frac{10}{100}
100
10
= 50 * 0,1 = 5
2) 20% от 80
80 * \frac{20}{100}
100
20
= 80 * 0,2 = 16
4) 35% от 900
900 * \frac{35}{100}
100
35
= 900 * 0,35 = 315
5) 24% от 500
500 * 0,24 = 120
2) 1) 20% = 7
x = 100%
x = 7 * 100% : 20% = 35
2) 40% = 40
x = 100%
x = 40 * 100% : 40% = 40 * 2,5 = 100
4) 25% = 43
x = 100%
x = 43 * 100% : 25% = 172
5) 60% = 36
x = 100%
x = 36 * 100% : 60% = 36 * 1,66 = 59,76
3) 50% = 9
x = 100%
x = 9 * 100% : 50% = 18
6) 1500% = 27
x = 100%
x = 27 * 100% : 1500% = 27 * 15 = 405
Получаем уравнение:
10х-х=23,58
9х=23,58
х=23,58/9
х=2,62
ответ: искомое число 2,62