Finley's pumpkin had a mass of 6.5 kilograms (kg) before he carved it. After carving it, the pumpkin had a mass of 3.9 kg. What was the percent decrease in the mass of the pumpkin?

The percent decrease in the mass of the pumpkin for this case will be given by:

(100 - (3.9 / 6.5) * 100) =

(100-60) =

40%

After carving it, the pumpkin decreases a percent of 40% in the mass