The fraction 4/10 is equal to 40.00% when expressed as a percentage. This common fraction represents four parts out of a total of ten parts, which is a useful way to think about percentages. It's often encountered in everyday situations, like describing test scores or progress towards a goal.
In practical terms, 4/10 or 40% means that something is less than half but more than a third of the whole. For example, if 4 out of 10 people prefer a certain product, it means that 40% of the group likes it. This fraction and its percentage equivalent are handy for quick mental calculations and estimations in various fields, from finance to statistics.