甲数比乙数多25%,则乙数比甲数少( )·
A.25% B.20% C.100% D.80%
B
解:设乙数是100, 100×(1+25%), =100×1.25, =125, (125-100)÷125, =25÷125, =20%; 答:乙数比甲数少20%; 故答案为:B.