How would you increase 400 by 7%

First, we'd want to find out what 1% of 400 is. If 400 is the total number, that would make 400 the whole 100%. In order to find out 1% we'd want to divide the number by 100 which is 4. Now that we know 1% is 4, 7% would b 4 multiplied by 7 which is 28. Now that we know 28 is 7%, if 400 is increased by 7% we add on this number to make 428.