3x/4-2/5=2 I am having a problem with adding 2/5 to the whole number. i want to say 2 2/5 but its not working for me please help

You're right.

3x/4-2/5=2
3x/4 = 2 2/5

Multiply both sides by 4,

3x = 9 3/5
x = (9 3/5)/ 3
x = 3 1/5