Kate organized her spending month in four categories:
Food - 422
Other - 633
Rent - 528
Fun - 317
The amount of the total spending is the sum of all the categories:
So 422+633+528+317 = 1900 total spending
If we want to know the percent that she spent on rent, use
Rent/total of spending
528/1900= 0.2778
Rounded to the nearest whole percent:
0.2778 = 27,78% = 28%