Answer:
Equation: 0.8 = 0.25 + x
Answer: 0.55 meters or 11/20 meters
Explanation:
The total amount of string = 4/5 m = 0.8 m
Used string (to hang the picture) = x m
Leftover string = 1/4 m = 0.25 m
Equation: 0.8 = 0.25 + x
Solve for x: x = 0.55 m = 11/20 m