India growth story received an impetus today when rating agency Moody's said it will grow at a strong pace of 7.5 per cent in 2015-16, the highest among G20 economies, helped by the reforms drive and lower oil prices. Moody's Investors Service in a report said, at a time of shifting global investment flows, India benefits from reduced external imbalances. G20 is a group of 20 developing and industrialised economies, which accounts for 85 per cent of the world's economic output.