Question

4% которой равны 15% числа 80:​

Answer 1

Ответ:

$\frac{x}{80} = \frac{15}{100} \\100x = 15 \times 80 \\ 100x = 1200 \\ x = 1200 \div 100 \\ x = 12$

$\frac{12}{x} = \frac{4}{100} \\ 4x = 100 \times 12 \\ 4x = 1200 \\ x = 1200 \div 4 \\ x = 300$

ответ

4% числа 300=15% числа 80

12=12