Answer:
20%
Step-by-step explanation:
To change a fraction to a percentage , multiply by 100%
× 100%
= 0.2 × 100%
= 20%
Answer:
Raymond's mistake was on the last step, since he didn't square root both sides
The correct answer should be

Step-by-step explanation:

Good luck!
20x^2+50 = -40x^2+110x [ Taking x as the unknown positive integer ]