they proposed an increase of 15 percent in the fare
Microsoft Computer Dictionary
n. A scalar or unit amount by which the value of an object such as a number, a pointer within an array, or a screen position designation is increased. Compare decrement1.vb. To increase a number by a given amount. For example, if a variable has the value 10 and is incremented successively by 2, it takes the values 12, 14, 16, 18, and so on. Compare decrement2.