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If 90% of A = 30% of B and B= x% of A, find x.
600
900
300
1200
90% of A = 30% of B
$$\frac{90}{100}A=\frac{30}{100}B$$
3A = B
Now,
B = x% of A
3A = $$\frac{x}{100}\times\ A$$
x = 300.
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