Thread: Formula to get to the number

1. Formula to get to the number

Hello,

I will appreciate some help on identifying the proper formula to handle a case such as the following:

- Let say we have a value (of 2000) and I will like to obtain the number to which when it is applied a 7% increase, it will sum 2000. Which is the formula to do this? Which is the mathematical name of this type of scenario?

Thanks,

2. Re: Formula to get to the number

$1.07 \times x = 2000\implies x = \frac{2000}{1.07}$

3. Re: Formula to get to the number

Thanks pickslides.

Just to learn a bit more on this. Remind me which is the mathematical name given to the formula you presented to me. I will like to look for more examples and math logic of this.

Regards,

4. Re: Formula to get to the number

Originally Posted by orlandold
Thanks pickslides.
Just to learn a bit more on this. Remind me which is the mathematical name given to the formula you presented to me. I will like to look for more examples and math logic of this.
Not a formula as such; just a multiplication/division thing.
Same as: what must 5 be multiplied by to give 30?
5 * m = 30
m = 30/5 = 6
What must 1.07 be multiplied by to give 2000?
1.07 * m = 2000
m = 2000/1.07 = 1869.15887....

If you're a "formula nut!", then:
A = original Amount (?)
D = Desired result (2000)
R = Rate (.07)

A = D / (1 + R)

or, if you prefer, make R the percentage (7%); then R = 7 and:
A = D / ( 1 + R/100)