SOLUTION: if 40 is decreased to 35, the decrease is what percent of the original number?

Algebra ->  Algebra  -> Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: if 40 is decreased to 35, the decrease is what percent of the original number?      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 220611: if 40 is decreased to 35, the decrease is what percent of the original number?
Found 2 solutions by likaaka, MathTherapy:
Answer by likaaka(51) About Me  (Show Source):
You can put this solution on YOUR website!
Set your equation as so,
1 - (35/40) = x, where 1 is representative of the whole 40 or 100% and the x is the decreased percentage
solve for x
1 - .85 = x
.15 = x, convert decimal fraction to percentage
x=15%
There is other ways to set up this equation like
40-35 = 5
5/40 = .15 or 15%

Answer by MathTherapy(639) About Me  (Show Source):
You can put this solution on YOUR website!
if 40 is decreased to 35, the decrease is what percent of the original number?

Since the decrease is 5 (40 - 35), and we want to know the percent decrease, we'll have: %285%2F40%29+%2A+100, or %281%2F8%29+%2A+100 = 0.125 * 100 =highlight_green%2812.5%29%