Mr Seah’s mass was 80 kg last year. He lost 15 kg this year. Find the percentage decrease in Mr Seah’s mass this year
Percentage decrease can be calculated using the formula:
Percentage Decrease = (Original Value - New Value) / Original Value x 100
In this case, the original value was 80 kg and the new value is 80 kg - 15 kg = 65 kg.
Percentage Decrease = (80 - 65) / 80 x 100
Percentage Decrease = 15 / 80 x 100
Percentage Decrease = 0.1875 x 100
Percentage Decrease = 18.75%
Therefore, the percentage decrease in Mr Seah's mass this year is 18.75%.