First think you need to add $1.23 and$1.54and your sum will be $2.77 ($1.54+$1.23=$2.77)
To find the percent increase, we divide the amount of change by the original number. The amount of change is the difference between the 2 numbers which in this case is 700 - 620 and the original number is 620.
700 - 620 is 80 so we're left with which is 0.129.
Finally, since our problem is asking for a percent, we write 0.129 as a percent by moving the decimal point 2 places to the right to get 12.9%
So when the population of a town changes from 620 to 700, it has increased by 12.9%.
They are both 40°. This is bc 180-65-75=40
Try this solution, check, please, issue no.4.