If 180% of x is equal to 1620, what will be the 45% of x ?
180% of x is equal to 1620
=> $$\frac{180}{100} \times x = 1620$$
=> $$x = \frac{1620}{1.8} = 900$$
$$\therefore$$ 45% of $$x = \frac{45}{100} \times 900$$
= $$45 \times 9 = 405$$
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