1.if 40% of pupils in a school are boys,what percentage of the pupils are girls? 2.increase 448 by 25% 3.decrease 20.00 by 5%
100 - 40 = ________
448 * 1.25 = ________
20 * 0.95 = __________
To get the answer to each of these questions, we can use simple percentage calculations. Here's how you can solve each one:
1. If 40% of pupils in a school are boys, we can find the percentage of girls by subtracting the percentage of boys from 100%. Here's the calculation: 100% - 40% = 60%. Therefore, 60% of the pupils in the school are girls.
2. To increase a number by a percentage, we can multiply the number by 1 plus the percentage in decimal form. In this case, to increase 448 by 25%, we calculate: 448 + (448 * 0.25) = 560. So, increasing 448 by 25% gives us 560.
3. To decrease a number by a percentage, we can multiply the number by 1 minus the percentage in decimal form. In this case, to decrease 20.00 by 5%, we calculate: 20.00 - (20.00 * 0.05) = 19.00. So, decreasing 20.00 by 5% gives us 19.00.