Study the given pie-chart and answer the question that follows.
The pie-chart represents the consumption offuel (in million litres) by various modes of transport of a country X in the year 2015. The total consumptionof fuel by various modesof transport of the country is 800 millionlitres.
(The data shown here is only for mathematical exercise. They do not representthe actual figures of the country.)

The fuel consumed by light vehicles is approximately what percentage of the combined consumption of fuel for aviation and waterways?