Answer:
210
Step-by-step explanation:
When working out a percentage for example 20% of 40, I follow 2 simple rules to get to the answer.
⇒ Multiply the percentage by the other number
⇒ Divide the multiplied number by 100
So for the example, Find 20% of 40
⇒ Multiply the percentage by the other number
→ 20 × 40 = 800
⇒ Divide the multiplied number by 100
→ 800 ÷ 100 = 8
So 20% of 40 is 8.
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Using the method above we can set up an equation. We will call the number we want to find 'x'
⇒ Form the equation
→ [tex]\frac{40*x}{100} =84[/tex]
⇒ Multiply both sides by 100 to isolate [tex]40*x[/tex]
→ [tex]40*x=8400[/tex]
⇒ Divide both sides by 40 to isolate x
→ [tex]x = 210[/tex]
So we know that 40% of 210 is 84. We can use the method at the top to see if our solution is correct
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⇒ Multiply the percentage by the other number
⇒ Divide the multiplied number by 100
So, Find 40% of 210
⇒ Multiply the percentage by the other number
→ 40 × 210 = 8400
⇒ Divide the multiplied number by 100
→ 8400 ÷ 100 = 84
So 40% of 210 is 84.
