Le't see.....if they shared some stamps, I'm going to assume that they had an equal number of them to start with......call this N........so the total they started with was 2N
After Pat gave 2/5 of what she had, she has N - (2/5)N = (3/5)N
And Kate must now have N + (2/5)N = (7/5)N
So......
Pat had (3/5) N of the total, 2N = 3/10N = 30% of the total
And Kate had (7/5)N of the total, 2N = 7/10 N = 70% of the total
So.....Kate had 40% more than Pat
