Question

am nevoie repede!!!!!!!!!!​

Answer 1

Bună!

n=numărul necunoscut

a) 16%n=20 ⇔ $\frac{16}{100}*n=20 <=> \frac{4}{25} *n=20/*25 <=> n=20*25:4=> n=125$

b) 16%n=50 ⇔

$\frac{4}{25} *n=50/*25 <=> n=25*50:4 => n=\frac{625}{2}$

c) 16%n=458

$\frac{4}{25}*n=458/*25 <=> n=458*25:4 => n=\frac{5725}{2}$

d) 16%n=$\frac{2}{3}$

$\frac{4}{25} *n=\frac{2}{3}/*\frac{25}{4} <=> n=\frac{25}{2}*\frac{1}{3} => n=\frac{25}{6}$

e) 16%n=32

$\frac{4}{25} *n=32/*25 <=> n=32*25:4 => n=200$

f)16%n=480

$\frac{4}{25}*n=480/*25 <=> n=\frac{480*25}{4} => n=3000$

g)16%n=256

$\frac{4}{25} *n=256/*25 <=> n=\frac{256*25}{4} => n=1600$