Final answer:
To increase £2193.67 by 8.5%, multiply it by 1.085 and round the result to 2 decimal places.
Step-by-step explanation:
To increase £2193.67 by 8.5%, you can multiply the amount by 1.085. So, £2193.67 * 1.085 = £2380.45. Rounding this answer to 2 decimal places gives £2380.45.