I try to solve this problem but not sure how the answer came up. Tanya kept track of her spending for one month. She spent a total of $77.

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I try to solve this problem but not sure how the answer came up. Tanya kept track of her spending for one month. She spent a total of $77. Forty percent of her monthly spending is spent on video games. 

a. How much money did Tanya spend on video games? 

b. Ten percent of her monthly spending is on snacks at the mall. How much money did she spend on snacks at the mall? 

c. What percent of video game money did she spend on snacks? Explain your answer. 

d. Compare the percent of money spent on snacks and video games to the percent of money spent on other purchases?