The pet store can buy a goldfish for $.25 and sell it for $.75. The owner plans to use the profits from goldfish sales to buy a new tank, which costs $100. After one week, he is 45% short of the price. How many goldfish did he sell that week?
He is $45 short because 100 x .45 = <T>multiply(100, 0.45)=45.0
He earned $55 off goldfish because 100 - 45 = <T>subtract(100, 45)=55
He makes $.5 profit per goldfish because .75 - .25 = <T>subtract(0.75, 0.25)=0.5
He sold 110 goldfish that week because 55 / .5 = <T>divide(55, 0.5)=110.0
