Answer:
(31/8). The decimal value is 3.875
Explanation:
First, let's convert all the fractions into ones that all have the same common denominator. I'll use a denominator of 40, since the existing values of 5 and 8, when multiplied together, give a value of 40.
The three terms:
-(1/8) = -(5/40) [Multiply by (5/5)]
(2/5) = (16/40) [Multiply by (8/8)]
3+(3/5) = 120/40 + ( 24/40) = (144/40) [Multiply both terms (3 and 3/5) by (8/8) and add them together]
Now sum all the terms:
-(5/40) + (16/40) + (144/40)
(-5 + 16 + 144)/(40)
(155/40)
This reduces to (31/8). The decimal value is 3.875