If 90% of a number is 621, what will be 50% of 20% of that number?
69
Step 1 – Find the number: Let the number be x. Given \(0.9x = 621\), so \(x = \dfrac{621}{0.9} = 690\).
Step 2 – Combine the percentages: 50% of 20% = \(0.5 \times 0.2 = 0.10\), i.e. 10% of the number.
Step 3 – Compute: \(0.10 \times 690 = 69\).
Hence the answer is 69.
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- A player holds 13 cards of four suits, of which seven are black and six are red. There are twice as many diamonds as spades and twice as many hearts as diamonds. How many clubs does he hold?
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