柯林斯词典proper fraction 1. N a fraction in which the numerator has a lower absolute value than the denominator, as or x/(3 + x²) 真分數 返回 proper fraction剑桥词典a fraction in which the number below the line is larger than the number above it (數學中的)真分數 3/4 and 5/8 are proper fractions . 3/4和5/8都是真分數。 返回 proper fraction