why Decimal('1.1249999999999999999').toNumber() is 1.125 and toFixed(2) is '1.12'

[liubolp]

var a = new Decimal(25).div(24).mul(0.99)
var b = new Decimal(24).div(23)
var c = new Decimal(23).div(22)
var d = new Decimal(25).div(24).mul(0.99).mul(24).div(23).mul(23).div(22)
var e = a.mul(b).mul(c)

why d.equals(e) is false!!!

[MikeMcl]

First, please explain to me how you set the precision of the division operation and what effect that has.

[liubolp]

Thank you for replying to my question, all my configurations are default. Decimal.precision is 20.
I want e.toFixed(2)=='1.13' What should I do？

[MikeMcl]

What do you think is the effect of having precision set to 20? Look at the result of individual division and multiplication operations. I am not going to do the work for you.

[liubolp]

e.toDP(Decimail.precision - 1).toFixed(2)Solved my problem！
Thank you!