Percent change as one multiplier
The question
decrease a number n by 10%
Which expression is "decrease a number n by 10%"?
Read it in order, then say which way around
n= a number
adding
0.9n
- The phrase is "decrease a number n by 10%". The letter n is the number nobody has told us; everything else in the phrase says what to do to it.
- The words say we are adding.
- "more than" makes 10 bigger, so 10 is what is added to.
How it works.
- 01
The phrase is "decrease a number n by 10%". The letter n is the number nobody has told us; everything else in the phrase says what to do to it.
- 02
The words say we are adding.
- 03
"more than" makes 10 bigger, so 10 is what is added to.