Answer:
78.75
Step-by-step explanation:
450 is increased by 75%
450 + 450*75%
Change to decimal form
450 +450*.75
450+337.5
787.5
Now decrease by 90%
787.5-787.5*90%
787.5-787.5*.9
787.5-708.75
450 + (450 x .75) = 787.5
787.5 - (787.5 x .90) = 78.75
