Răspuns :
[tex] \frac{x}{100} \times 640 = 16 \\ \frac{640x}{100} = 16 \\ 6.4x = 16 \\ x = 16 \div 6.4 \\ x = 160 \div 64 \\ x = 2.5\%[/tex]
…ᘛ⁐̤ᕐᐷฅ^•ﻌ•^ฅ
[tex] \frac{x}{100} \times 640 = 16 \\ \frac{640x}{100} = 16 \\ 6.4x = 16 \\ x = 16 \div 6.4 \\ x = 160 \div 64 \\ x = 2.5\%[/tex]
…ᘛ⁐̤ᕐᐷฅ^•ﻌ•^ฅ