The following pie-chart shows the sales in a restaurant in a day, in percentage terms. If the total number of items sold in a day is 100, then what is the central angle made by the sector giving data about the sale of 'Sandwich' in the pie-chart?

20° 72° 45° 90°

72°

Total number of items sold in a day = 100 Central angle corresponding to sale of sandwich = \(\frac{20 }{100}\) × 360° = 72°