Write a function that takes in a string and decreases all monetary values in the string by 15%.
Examples:
// "I spent $100.00 on Amazon this week." -> "I spent $85.00 on Amazon this week."
// "This candy costs $1.00" -> "This candy costs $0.85"This Amazon VO problem asks you to scan a string, find every monetary value, and reduce each one by 15%. A typical solution uses pattern matching to locate currency amounts, converts the numeric part, multiplies by 0.85, and then rebuilds the string while preserving all non-monetary text. The main challenges are detecting amount boundaries and formatting the updated value consistently.
END
