92/7 - (-10 3/7) i need it as a fraction

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days