The question is ambiguous because it contains so little context. It could be an increase is wealth of 45 million units of currency, or it could be someone in a race gaining a lead of 45 metres, or of 45 minutes.
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= 100 cm ⇒ 45 m = 45 x 100 cm = 4500 cm
45 = 30 + m Subtract 30 from both sides: 15 = m
It is 45/100.
It is 45 square m
Answer: 45 m² = 53.8195 yd²