The following equation shows the approximate relationship between the percentageyof total personal consumption spent on food and the corresponding percentagexspent on education. y=(36/ x^0.36) percentage points;(6.5x17.5).

According to the model, spending on food is decreasing at a rate of______ percentage points per one percentage point increase in spending on education when 10% of total consumption is spent on education. (Answer should be rounded to two significant digits.)