We have a question: At a James Bond movie party, each guest is either male (M) or female (F. 40% of the guests are women, 80% of the women are wearing rabbit ears, and 60% of the males are wearing rabbit ears. If the total number of guests at the party is 200, given all this information, what is the total number of people wearing rabbit ears?
And an answer: 136
So how you got the answer?
If 40% of the guests are females, then there are 40 / 100 * 200 = 80 female guests at the party. The number of female guests wearing rabbit ears is 80 / 100 * 80 = 64. The number of male guests is 200 guests - 80 female guests = 120. If 60% of the male guests are wearing rabbit ears, then there are 60 / 100 * 120 = 72 male guests wearing rabbit ears. The total number of guests wearing rabbit ears is 64 + 72 = 136.

We have a question: Barbara has 9 stuffed animals. Trish has two times as many stuffed animals as Barbara. They planned to sell their stuffed animals and donate all the money to their class funds. Barbara will sell her stuffed animals for $2 each while Trish will sell them for $1.50 each. How much money will they donate to their class funds?
And an answer: 45
So how you got the answer?
Barbara will be able to sell all her stuffed animals for 9 x $2 = $18. Trish has 9 x 2 = 18 stuffed animals. Trish will be able to sell all her stuffed animals for 18 x $1.50 = $27. Therefore, they will donate a total of $18 + $27 = $45 to their class funds.

We have a question: Tom Sawyer has tricked his friends into whitewashing Aunt Polly's 100-foot fence. His first friend, Ben, whitewashed 10 feet. His second friend Billy whitewashed a fifth of the remaining fence. A third friend, Johnny, whitewashed a third of the fence that was left after that. How much of the fence still needs to be whitewashed?
And an answer: 48
So how you got the answer?
It's a 100 - foot fence, and Ben whitewashed 10 feet, so there are 100 - 10 = 90 feet left after Ben is done. Billy whitewashed a fifth of that, or 90 / 5 = 18 feet. There is now 90 - 18 = 72 feet of fence left. Johnny whitewashes a third of that, or 72 / 3 = 24 feet. That leaves 72 - 24 = 48 feet of fence left to be whitewashed.