Given:
40 stores in total
55% of the stores are in California, the rest are in Nevada.
This is simply multiplying the corresponding percentage from the whole to get its number and deducting the number to get the required number.
40 represents 100%.
40 x 55% = 22 stores in California
40 - 22 = 18 stores in Nevada.
There are 18 stores in Nevada.
Since 55% represents California, then, 45% represents Nevada.
40 * (100% - 55%) = 40 * 45% = 18 stores.
