An approximation for calcularing interest at 4% for a number of dayd is to multiply the number of pounds invested by the number of days and divide this product by 90 this gives an approximation for the interest in new pence. Use this approximation to find the interest on £120 for 50 days. Find also the correct value of the interest to the nearest new pennyAn approximation for calcularing interest at 4% for a number of dayd is to multiply the number of pounds invested by the number of days and divide this product by 90 this gives an approximation for the interest in new pence. Use this approximation to find the interest on £120 for 50 days. Find also the correct value of the interest to the nearest new penny