Answer:
690%
Step-by-step explanation:
To find the percent increase, take the new amount and subtract the original amount
5600000-80000=5520000
Divide it by the original amount
5520000/800000
6.9
Multiply this by 100% to change from decimal form to percent form
6.9*100%
690%
X+y=155. Y= -x+155
1.50x +4(-x+155)= 520
1.50x-4x+620=520
-2.5x =-100
X= 40. Y=110