7. A team won \( 70 \% \) of the 40 games it played How many games did il lose? \[ \begin{array}{l} \begin{array}{lll} \text { (A) } 28 & 0.70 & 70 \\ \text { (B) } 30 & 3 \\ \text { (C) } 22 & 340 & \frac{x 40}{00} \end{array} \\ \text { (D) } 12-28+280 x \\ \text { (E) } 7 \frac{-28}{(12)}+\frac{280 x}{2800}=28 \end{array} \]

To find out how many games the team lost, we first need to calculate the total number of games they played and won. They won \( 70\% \) of \( 40 \) games, which means they won \( 0.70 \times 40 = 28 \) games. Now, to find the number of games they lost, we subtract the number of games won from the total games played: \( 40 - 28 = 12 \). So, the team lost \( 12 \) games! By the way, this kind of percentage problem can often feel tricky, but once you break it down, it’s a piece of cake! Just remember to visualize the total first – it's a great way to avoid getting lost in the numbers. If you want to dive deeper into percentage problems, check out resources on basic math principles. Websites or books covering elementary algebra can often have clear explanations and practice problems to help sharpen your skills. Happy learning!