Question

Decrease 20g by 12.5%

Answer 1

Step-by-step explanation:

New value =

20 - Percentage decrease =

20 - (12.5% × 20) =

20 - 12.5% × 20 =

(1 - 12.5%) × 20 =

(100% - 12.5%) × 20 =

87.5% × 20 =

87.5 ÷ 100 × 20 =

87.5 × 20 ÷ 100 =

1,750 ÷ 100 =

17.5

Calculate absolute change (actual difference)

Absolute change (actual difference) =

New value - 20 =

17.5 - 20 =

- 2.5

Proof.

Calculate percentage decrease:

Percentage decrease =

12.5% × 20 =

12.5 ÷ 100 × 20 =

12.5 × 20 ÷ 100 =

250 ÷ 100 =

2.5

For positive numbers

Absolute change (actual difference) =

- 1 × Percentage decrease

Answer:

20 decreased by 12.5% = 17.5

Absolute change (actual difference):

17.5 - 20 = - 2.5

Answer 2

Answer:

17.5g

Step-by-step explanation: