1 4/5 + (2 3/20 + 3/5) =

4 11/20

Step-by-step explanation:

We can start by converting all the fractions into improper fractions:

1 4/5 = 4/5+5/5=9/5

2 3/20 = 40/20+3/20=43/20

This means the equation would be

9/5 + (43/20+3/5) =

We now need to get a common denominator.

We can do this by multiplying 9/5 and 3/5 both by 4/4.

This said, 9/5 would become 36/20

and 3/5 would become 12/20

Our equation is now:

36/20+43/20+12/20=

This equals

91/20

which simplifies to

4 11/20