Here's how to subtract 2/5 from 4/5:


Step 1Since our denominators match, we can subtract the numerators. 4 − 2 = 2 So the answer is:


Step 2Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction? To find out, we try dividing it by 2... Nope! So now we try the next greatest prime number, 3... No good. 3 is larger than 2. So we're done reducing. There you have it! The final answer is:
