Question 773541
I am 16 years old. i'm also 4 times older than my sister. after many years i'm will be 2 times older than my sister. how old i am?
----------
4 times older = 5 times as old.
--> she's 3.2 years old.
The difference is 12.8 years, and will remain constant.
--> 2 times older = 3 times as old
your age + 12.8 = 3*your age
After 6.4 years.
==========================
If 4 times older = 4 times as old, then how much is 1 times older, or a 100% increase?
They are not the same.