Question: 55% of Toby's friends are boys and the rest are girls. If he has 33 friends who are boys, how many friends does he have who are girls?
Answer with step-by-step thinking: Toby has 60 friends because 33 / .55 = 60. 45% of his friends are girls because 100 - 55 = 45. He has 27 friends who are girls because 60 x .45 = 27.
So the answer is 27.


Question: Leila spent $40 which is 1/4 of her money on a sweater. She was then left with $20 after spending the rest of her money on buying pieces of jewelry. How much more did Leila spend on jewelry than on the sweater?
Answer with step-by-step thinking: Since 1 / 4 of her money is $40, then Leila originally had $40 x 4 = $160. $160 - $40 = $120 was left after buying a sweater. Since she is left with $20, Leila spent $120 - $20 = $100 on jewelry. Therefore, she spent $100 - $40 = $60 more for jewelry than on a sweater.
So the answer is 60.


Question: There are 248 pages in a book. Joanna can read 16 pages per hour. On Monday, she reads for 3 hours. On Tuesday, she reads for 6.5 hours. How many more hours does she need to read to finish the book?
Answer with step-by-step thinking:
On Monday, Joanna reads 3 * 16 = 48 pages. On Tuesday, Joanna reads 6.5 * 16 = 104 pages. So far, she has read 48 + 104 = 152 pages. Thus, she has 248 - 152 = 96 pages left. She will need to read for 96 / 16 = 6 hours to finish the book.
So the answer is 6.