The fraction 30/70 is equal to 42.86% when expressed as a percentage. This means that 30 out of every 70 parts represents about 43% of the whole. It's a bit less than half, but more than a third of the total.
In everyday situations, you might encounter this fraction when dealing with things like survey results or statistical data. For example, if 30 out of 70 people prefer a certain product, you could say that 42.86% of the group likes it. This percentage gives a clearer picture of the proportion compared to just using the fraction alone.