Tool By Zeal Point

Q. 4% / 8 % = ?, Option a. 2% b. 1/2% c. 50% d. 5.0%

$: 4% = 0.04 = 0.5 = 50%$

So the correct ans is:

Wrong:

Wrong Step:

Right Step:

The "%" symbol cancels because: 4% / = 4/100 / 8/100 = 4/8 = 1/2

Rule: When dividing one % by another %, the % sign cancels.

So divide only the numbers.

Correct: 4 ÷ 8 = 1/2 = 50%, Wrong: 1/2%

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1. A student scored 72 out of 90 in a test. What percentage did he score ?

Solution: $Percentage = Part/Whole \times 100$ $= 72/90 \times 100$ $= 0.8 \times 100 = 80%$

2. Decrease 250 by 20%.

Solution: $20% of 250 = 20/100 \times 250 = 50$ , $New Value = 250 - 50 = 200$

3. Increase 120 by 15%.

Solution: $15% of 120 = 15 \times 120 = 18,$ $New Value = 120 + 18 = 1 38$

4. What percentage is 15 of 60 ?

Solution: $Percentage = Part \times 100$ $= 15/60 \times 100$ $= 25%$

5. Find 25% of 80.

Solution: $25% of 80 = 25/100 \times 80$ $= 20$

Formulas

$Percentage = Part/Whole \times 100$

$x % of N = x \times N$

Increase: Original + Increase
Decrease: Original − Decrease

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