Question 366064
{{{3/4 + 4/9 =(3+4)/9=7/9}}}
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{{{(7/5)*(3/10) =(7*3)/(5*10)=21/50 }}}
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{{{(3/10)/(7/15) =(3/10)*(15/7)=(3*15)/(10*7)=(3*3)/(2*7)=9/14}}}