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
15/80 = ?
To find the percentage decrease in Mr Seah's mass this year, follow these steps:
Step 1: Calculate the decrease in his mass.
Mass decrease = Initial mass - Final mass
Mass decrease = 80 kg - (80 kg - 15 kg)
Mass decrease = 80 kg - 65 kg
Mass decrease = 15 kg
Step 2: Calculate the percentage decrease.
Percentage decrease = (Mass decrease / Initial mass) * 100
Percentage decrease = (15 kg / 80 kg) * 100
Step 3: Simplify the calculation.
Percentage decrease = 0.1875 * 100
Percentage decrease = 18.75%
Therefore, Mr Seah's mass decreased by 18.75% this year.
To find the percentage decrease in Mr Seah's mass this year, you can use the following formula:
Percentage Decrease = (Change in Value / Original Value) x 100%
In this case, the change in value is the decrease in mass, which is 15 kg. The original value is Mr Seah's mass last year, which was 80 kg.
Now, let's plug in these values into the formula:
Percentage Decrease = (15 kg / 80 kg) x 100%
Simplifying the calculation:
Percentage Decrease = (0.1875) x 100%
Percentage Decrease = 18.75%
Therefore, the percentage decrease in Mr Seah's mass this year is 18.75%.