Question 866292
The 10% decrease could be thought of as a price change by factor of 0.90.


Step 1:
p*(1.2)


Step 2:
(p*1.2)(1.25)


Step 3:
p(1.2)(1.25)(0.90)


The overall factor produced in the three steps are {{{(1.2)(1.25)(0.9)=1.35}}}, which means 35% price increase from the original price.