Ineed with these 2 problems, change 102/100 to a percent and explain how you did it and the other is changing 5 1/2% to a decimal.

To change a a fraction that is a hundredth to a decimal, you just use the first number as a percent, so the answer is 102%. The reason this works is because a percent is a number relevant to a hundred units. Where 1% is 1/100, 102/100 would be 102%. For the next problem we have 5.5 percent. To get it to a decimal we turn it to a fraction first, which is 5.5/100, and then we will divide by 100. We move the decimal to the left twice, giving us 0.055 as the decimal form.

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city. 

I'm going to say it's 5-6 million