We have a question: Stephanie is checking her household budget, and needs to calculate how much she has left to pay for her bills. Her electricity bill costs $60, and this is paid in full. Her gas bill was $40, and she has already paid three-quarters of this. She makes another payment of $5 towards her gas bill while checking her budget. Her water bill is $40, which she has paid half of, and her internet bill is $25, which she has made 4 payments of $5 towards. Overall, how many dollars does Stephanie still need to pay to finish paying her bills?
And an answer: 30
So how you got the answer?
Stephanie has paid three - quarters of her gas bill, which is 40 * 0.75 = $30. She then made another payment, which means she has paid 30 + 5 = $35 of her gas bill. She has paid half of her water bill, which is 40 * 0.5 = $20. She has made 4 payments towards her internet bill, which is a total of 4 * 5 = $20. Overall, her bills were 60 + 40 + 40 + 25 = $165. Overall, she has made payments of 60 + 35 + 20 + 20 = $135. Therefore, she still has to pay 165 135 = $30.

We have a question: One hundred people attended a party. Fifty percent of the attendees are women, thirty-five percent of them are men, and the rest are children. How many children attended the party?
And an answer: 15
So how you got the answer?
Out of 100 attendees, 100 x 50 / 100 = 50 are women. While 100 x 35 / 100 = 35 are men. So there were a total of 50 + 35 = 85 men and women who attended the party. Thus, 100 - 85 = 15 children attended the party.

We have a question: Mr. John jogs for 1 hour 30 minutes in the morning every day. How much time (in hours) will he have spent jogging after two weeks?
And an answer: 21
So how you got the answer?
There are 60 minutes in an hour so 1 hour 30 minutes is equivalent to [1 + (30 / 60)] hours = 1.5 hours. There are 7 days in a week so he spends 1.5 * 7 = 10.5 hours jogging every week. After 2 weeks he will have spent 2 * 10.5 = 21 hours jogging.