Bonsoir,
5 min → [tex]\dfrac{5}{60}=\dfrac{5 \div 5}{60 \div 5}=\dfrac{1}{12}[/tex]
12 min → [tex]\dfrac{12}{60}=\dfrac{12 \div 12}{60 \div 12}=\dfrac{1}{5}[/tex]
36 min → [tex]\dfrac{36}{60}=\dfrac{36 \div 12}{60 \div 12}=\dfrac{3}{5}[/tex]
54 min → [tex]\dfrac{54}{60}=\dfrac{54 \div 6}{60 \div 6}=\dfrac{9}{10}[/tex]
80 min → [tex]\dfrac{80}{60}=\dfrac{80 \div 20}{60 \div 20}=\dfrac{4}{3}[/tex]
Bonne continuation ! ;)
