Question

Ann had 75 fliers to post around town. Last week,

she posted 2/5 of them. This week, she posted 2/3 of the remaining fliers. How many fliers has she still not posted?

Answer 1

so, she had 75 fliers total, then she posted 2/5, how much is 2/5 of 75? well, is just their product,


`\bf 75\cdot \cfrac{2}{5}\implies \cfrac{150}{5}\implies 30 \\\\\\ \textit{how much is }(2)/(3)\textit{ of }\stackrel{remaining~75-30}{45}\textit{ fliers?}\qquad 45\cdot \cfrac{2}{3}\implies \cfrac{90}{3}\implies 30`

so, she had 75 total, she posted 30, then 30 again, so she hasn't posted 75 - 30 - 30.