Respuesta :
The first thing you have to do is make both have common denominators.
Turn 3/4 into 15/20 and turn 2/5 into 8/20
Then the equation becomes 15/20 - 8/20 = 7/20
And 7/20 is your final answer
Turn 3/4 into 15/20 and turn 2/5 into 8/20
Then the equation becomes 15/20 - 8/20 = 7/20
And 7/20 is your final answer