Suppose on January 15, 2020, the U.S. Treasury issued a ten-year inflation indexed note with a coupon of 7%. On the date of issue, the CPI (consumer price index) was 400. By January 15, 2030, the CPI index had decreased to 330. What principal and coupon payment was made on January 15, 2030? (Note: U.S. Treasury pays semi-annual coupons)

The CPI index deppreciated by ____ (Round to five decimal points)