Vom folosi operatia de inmultire:
a)
[tex]\frac{p}{100} \cdot 108=6\\\\\frac{108p}{100} =6\\\\108p=600\\\\p=\frac{600}{108}= 5,(5)\%[/tex]
b)
[tex]\frac{p}{100}\cdot 50=80\ \ \ |:10\\\\ \frac{5p}{100}=8\\\\ 5p=800\\\\p=160 \%[/tex]
c)
[tex]\frac{p}{100}\cdot 400=20\ \ \ \ |:20\\\\\frac{20p}{100}=1\\\\ 20p=100\\\\p=5\%[/tex]
d)
[tex]\frac{p}{100}\cdot16=4\ \ \ \ |:4\\\\\frac{4p}{100} =1\\\\4p=100\\\\p=25\%\\[/tex]
e)
[tex]\frac{p}{100}\cdot 300=12\\\\3p=12\\\\p=4\%[/tex]
Un alt exercitiu gasesti aici: https://brainly.ro/tema/17735
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