Question: Lara was 9 years old 7 years ago. How old will she be 10 years from now?
Answer: Step-by-step reasoning process: Lara is 9 + 7 = 16 years old now. Thus, she will be 16 + 10 = 26 years old 10 years from now.
So the answer is 26.

Question: A luxury perfume costs $1200. The store owner decided to increase its price by 10% so that he could earn more profit. Few weeks had past but the perfume was still not sold. So, the owner decided to lower the price by 15%. By how much was the final price lower than the original price?
Answer: Step-by-step reasoning process: There was a $1200 x 10 / 100 = $120 increase of the original price. So, the perfume was priced for $1200 + $120 = $1320. Then, 15% of the new price is $1320 x 15 / 100 = $198. So, the final price is now $1320 - $198 = $1122. Therefore, the final price is $1200 - $1122 = $78 lower than the original price.
So the answer is 78.

Question: Josh has $300 in his wallet, and $2000 invested in a business. If the business's stock price rises 30% and then he sells all of his stocks, how much money will he have in his wallet?
Answer: Step-by-step reasoning process: If the business's stock price rises 30%, then his share on the company is worth 30% multiplied by $2000 plus $2000 that he already had. That results in 30% * $2000 + $2000 = $600 + $2000 = $2600. Since he already had $300, with $2600 more he will have $300 + $2600 = $2900.
So the answer is 2900.

Question: A gift shop sells bracelets at $15 each, a gold heart necklace at $10, and a personalized coffee mug at $20. Raine buys three bracelets, two gold heart necklaces, and one coffee mug for her friends. How much change does Raine get back if she gives a one hundred dollar bill?
Answer:
Step-by-step reasoning process: Three bracelets cost 3 x $15 = $45. Two gold necklaces cost 2 x $10 = $20. Thus, the total amount is $45 + $20 + $20 = $85. Therefore, Raine gets a change of $100 - $85 = $15.
So the answer is 15.