Question 524890
if 110 is the SP CP=100
165 was the SP

110 ------100
165-------x

x/100=165/110
x=(100*165)/110

CP= 150

sold for 157.50


150--------------7.50
100--------------x

x/7.50 = 100/150

x=7.50*100/150

She makes a profit of 5%