6.50 is 25% of what number?
2 answers:
Answer: 26
Step-by-step explanation: Reading through the problem we have "6.50 is" that's 6.50 =, "25%" 25/100, "of" times, "what number" x.
I changed 25% to 25/100 because "percent" means over 100.
Reducing the 25/100 to 1/4, we have 6.50 = .
Multiplying both sides by 4 to get rid of the fraction, we have 26 = x.
So 6.50 is 25% of 26.
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This requires 2 pints of oil.
Using a proportion to solve this, we have:
Cross multiplying, we have
1/2*10 = (2 1/2)*x
5 = (2 1/2)x
Divide both sides by 2 1/2:
5÷(2 1/2) = (2 1/2)x÷(2 1/2)
2 = x
Using a proportion to solve this, we have:
Cross multiplying, we have
1/2*10 = (2 1/2)*x
5 = (2 1/2)x
Divide both sides by 2 1/2:
5÷(2 1/2) = (2 1/2)x÷(2 1/2)
2 = x