The advantage of this technique is that it removes the impact of near term flucuations and accounts for the overarching direction of Raffles Medical Group's earnings trajectory over time, which may be more relevant for long term investors. To calculate this rate, I put a line of best fit through analyst consensus of forecasted earnings. The slope of this line is the rate of earnings growth, which in this case is -0.5%. This means that, we can anticipate Raffles Medical Group will chip away at a rate of -0.5% every year for the next few years.