10.89
99
Increase 90 by 10 percent, by multiplying 90 times 1.10 or it is 99.
It has increased by 9, 9 is 10% of 90 so it has increased by 10%. 99 is therefore 110% of 90. Formula: (99 - 90) / 90 = 0.1, or 10%
12.5% increase.
10*99/100 = 9.9
- In order to increase a quantity by 10%, you multiply it by 1.1.- In order to decrease a quantity by 10%, you multiply it by 0.9.Starting out with a quantity of 100, we want to increase it 10%, and then decrease THE RESULT by 10%.(100) x (1.1) = 110(110) x (0.9) = 99The ending quantity is 99.The hypothesis of the question is exactly backwards. The net result is a 1-percent DECREASE.
10% of 99 is 9.9= $9.90
If you increase it by 10% and then reduce it by 10% you don't get the original number. Example 100 + 10% = 110. However if you now take 10% of 110 away that is 11. And 110 minus 11 = 99.
99.
9.9
99
90 + 10% = 99