30/40 = 75%
A value like 30/40, or 75%, can show up in everyday situations such as getting 30 questions right out of 40 on a quiz. It can also describe having 30 of 40 seats filled, completing 30 of 40 tasks, or receiving 30 positive responses out of 40.
To picture 30/40 quickly, imagine four equal groups of ten, with three groups shaded or completed. That makes it easy to estimate as about three-quarters, or roughly 75%.
A common mistake is thinking 30/40 is closer to one-half because both numbers look large. The important thing is the relationship between the two numbers: 30 is three out of four equal parts of 40, not half.
