72
560 decreased by 90 percent = 56
93 decreased to 90 would be an example of rounding down.
When 18 is decreased by (-27), the result is 45.
2780 decreased by 10% = 90% of 2780 = 2780*90/100 = 2502
If you decrease something to 90, you have 90 left.
Well, darling, if you take 5% of 90, you get 4.5. So, if you decrease 90 by 4.5, you're left with 85.5. So, 90 decreased by 5% is 85.5.
Cut in half, decreased by 50%.
No, it is not.
The ratio of 90 to 18 is written as 90/18
33%
No, 90 is a multiple of 18. 18 is a factor of 90.
a + 18 = 90 is a linear equation in one variable. Adding both sides by -18, we get a + 18 - 18 = 90 - 18 a = 90 - 18 = 72