Question

Afla cite procente reprezinta 5 din 40

Answer 1

x/100×40=5⇒40x/100=5⇒40x=100×5⇒40x=500⇒x=500/40⇒x=12.5
sucees

Answer 2

[tex]p\% \ din\ 40 =5 \Rightarrow\ \dfrac{p}{100}\cdot 40 = 5 |_{: 40} \Rightarrow \dfrac{p}{100}= \dfrac{5}{40} \Rightarrow \\\;\\ \Rightarrow p = \dfrac{500}{40} = \dfrac{50}{4} = \dfrac{25}{2} = 12, 5\%[/tex]

Sau:

[tex]p\% \ din\ 40 =5 \Rightarrow\ \dfrac{p}{100}\cdot 40 = 5 \Rightarrow\ p\cdot\dfrac{40}{100 }= 5 \Rightarrow\ p = 5: \dfrac{40}{100} = \\\;\\ = 5\cdot \dfrac{100}{40} =\dfrac{5}{1}\cdot \dfrac{100}{40} = \dfrac{500}{40} = 12,5\% [/tex]