70/100 = 70%
A value of 70% shows up in everyday life when a quiz score is 70 out of 100, a store offers a 70% discount, or a weather forecast gives a 70% chance of rain. It usually means something is true or applies to about seven out of every ten cases.
To picture it quickly, imagine a row of ten equal boxes with seven shaded in. That gives you a sense that 70% is more than half, but still leaves a noticeable part unshaded.
One common mix-up is thinking a 70% discount means paying 70% of the original price. It actually means 70% is taken off, so you pay the remaining 30%.