Accepted Answer
You can explain this subtraction from many different aspects. One of them could be just working with these given numbers when we increase them proportionally, final answer also increases proportionally. For example,16 - 7 = 99160 - 70 = 90If we add the final results to the subtracted number, we will get the number itself. For example,16 - 7 = 916 = 7+ 9
Suggested Answer
not hard at all16 - 7 = 9so you can mean difference as a percentage of the original statement, as in 160 - 7 = 90or, just plain simple 9 difference, as in 10 - 1 = 9, or 100 - 91 = 9