Answer:20 groups
Step-by-step explanation: to find out how many groups of 1/5 are in 4, we can use division.
First, let's convert the fraction 1/5 into a decimal. We can do this by dividing 1 by 5:
1 ÷ 5 = 0.2
Now, let's divide 4 by 0.2 to find out how many groups of 0.2 are in 4:
4 ÷ 0.2 = 20
So, there are 20 groups of 1/5 in 4.