If a number is increased by 20% and then decreased by 20%, the final number is what percentage of the original number? A. 96% B. 100% C. 104% D. 120% 相关知识点: 试题来源: 解析 A。本题考查数学推理中的百分比变化。设原数为 100,增加 20%后变为 120,再减少 20%,即 120 的 20...
A number is increased by 50% and then decreased by 30%. What is the net increase or decrease? A. 15% increase B. 15% decrease C. 20% increase D. 20% decrease 相关知识点: 试题来源: 解析 A。假设这个数是100,增加50%后变为150,再减少30%变为105,所以是增加了5,5占100的5%,但是是在...
If a number is increased by 20% and then decreased by 20%, what is the overall change? A. No change B. 4% decrease C. 4% increase D. 20% decrease 相关知识点: 试题来源: 解析 B。设这个数为 100,增加 20%后变为 120,再减少 20%,120×(1 - 20%) = 96,(100 - 96)÷100 = 4...
What is the final percentage change compared to the original number? A. 4% decrease B. 4% increase C. No change D. 20% decrease 相关知识点: 试题来源: 解析 A。设这个数为 x,增加 20%后变为 1.2x,再减少 20%变为 1.2x×0.8 = 0.96x,所以相比原来减少了 4%。反馈 收藏 ...
A. Decreased by 4% B. Increased by 4% C. No change D. Decreased by 20% 相关知识点: 试题来源: 解析 A。解析:设这个数为 100,增加 20%后是 120,再减少 20%是 120 乘以(1 - 20%)等于 96,相比原来减少了 4,减少的百分比是 4 除以 100 等于 4%。反馈...
A number is increased by 50% and the result is 150. What was the original number? A. 100 B. 120 C. 130 D. 140 相关知识点: 试题来源: 解析 A。解析:设原来的数为x,增加50%后的数就是x加上50%x,即x+0.5x = 1.5x。已知结果是150,那么1.5x = 150,x就等于150除以1.5,得到100,所以选...
If a increased by 20% of a results in b, then a + (20% of a) = b, a +0.2a =b, 1.2a = b. When b is decreased by 33(1/3)% of b, the result is c, so b - (1/3)b = (2/3)b = c. Since c = (2/3)b = (2/3)(1.2a) = 0.80a, then c is 80% of a...
Greater than the original number C. Less than the original number D. Can't be determined 相关知识点: 试题来源: 解析 C。Let the original number be 100. Increased by 20%, it becomes 120. Then decreased by 20% of 120 which is 24. So the final number is 96 which is less than the ...
If a number is increased by 20% and the result is 80, what was the original number? A. 60 B. 64 C. 66 D. 70 相关知识点: 试题来源: 解析 A。设原数为 x ,x + 0.2x = 80 ,1.2x = 80 ,x = 66.67 ,约为 60 。反馈 收藏 ...
If a number is increased by 20% and then decreased by 20%, what is the result compared to the original number? A. The same B. 4% less C. 4% more D. 20% less 相关知识点: 试题来源: 解析 B。解析:设原数为 x,增加 20%后变为 1.2x,再减少 20%变为 1.2x×0.8 = 0.96x,比原数...