Bjr,
Ex. 1 :
[tex] \frac{45}{108}= \frac{5*9}{12*9}= \frac{5}{12}
[/tex]
[tex] \frac{21}{84}= \frac{21}{21*4}= \frac{1}{4} [/tex]
[tex] \frac{328}{320}= \frac{41*8}{40*8}= \frac{41}{40} [/tex]
[tex] \frac{65}{13}= \frac{13*5}{13}=5 [/tex]
[tex] \frac{49}{98}= \frac{49}{49*2}= \frac{1}{2} [/tex]
[tex] \frac{28}{100}= \frac{7*4}{25*4} = \frac{7}{25} [/tex]
Ex. 2 :
1) [tex] \frac{2}{5}*25= \frac{2*25}{5} = \frac{50}{5}=10 [/tex]
2) [tex] \frac{1}{2}* \frac{3}{4}*72= \frac{3}{8}*72= \frac{3*72}{8}= \frac{216}{8}= 27[/tex]
Ex. 3 :
1) [tex] \frac{2}{3}* \frac{3}{4}= \frac{6}{12}= \frac{1}{2} [/tex]
2) [tex] \frac{1}{2}*24= \frac{24}{2}=12 [/tex]
