Prime Minister Narendra Modi has "no knowledge" of economy, Rahul Gandhi said today at a rally in Rajasthan, adding that using old parametres, India's Gross Domestic Product (GDP) is growing only at 2.5 per cent. The Congress leader also accused PM Modi of "destroying the image of India" abroad. "During UPA, India grew at 9 per cent. The entire world was looking towards us. Today, you have different parameters to measure GDP and you have 5% rate, if you use old parameters, then India is growing at 2.5 per cent," the Congress MP said, addressing a rally in Jaipur.