The property fee has increased from 1.2 to 1.5. How much is the increase?

1. charging standard for elevator-free property services: the benchmark charging standards corresponding to the five property service levels from Grade I to Grade V are 0.25 yuan/m2, 0.45 yuan/m2, 0.70 yuan/m2, 1.00 yuan/m2, 1.25 yuan/month respectively. The floating range does not exceed 20% up and down.

2. Elevator property service charges: The benchmark charges corresponding to the five property service levels from Grade I to Grade V are 0.50 yuan/m2, 0.80 yuan/m2, 1.00 yuan/m2, 1.30 yuan/m2, 1.80 yuan/month respectively. The floating range does not exceed 20% up and down.