describe and summarise The pie charts compare the changes of a particular school annual spending in three separate years: 1981, 1991 and 2001. Over the 20-year period, teachers’ salaries played a predominant role in total school costs. Its proportion experienced a huge rise from 40% in 1981 to 50% in 1991, and then it stared to decline by 5% in 2001. However, other worker’s salaries saw two consecutive falls, from 28% in 1981 to 15% in 2001. As for others, the proportion of resources and furniture and equipment were equal at 15% in 1981. Resources’proportion dropped by 6% from 1981 to 2001 eventually, although it increased by 5% in the first 10 years. While there was a upward trend in that of furniture and equipment which climbed dramatically by 8% from 1981 to 2001 of the school budget. In addition, insurance’s spending was the least over this years but it went up continuously from only 2% in 1981 to 8% in 2001. Overall, teachers’ salaries accounted for the largest costs to the school. And the spending of furniture and equipment and insurance continuously rose while that of resources and other workers’ salaries dropped correspondingly.