Proportion. An expression of equality of two ratios is called a proportion.

Quotient. The number found by division is called the quotient.

Rate. The number of hundredths of the base to be taken is called the rate; thus the rate of interest may be 6%, the rate per cent of interest being then 6. The amount of tax on a dollar is often called the rate of taxation. The premium on each $100 of fire insurance or each $1000 of life insurance is often called the rate of insurance.

Ratio. The relation of one quantity to another of the same kind, as expressed by division of the first by the second, is called their ratio. Reciprocal. The reciprocal of a fraction is the fraction with its terms interchanged. Unity divided by any number is called the reciprocal of the latter.

Reduction. Changing the form of a number without changing the value is called reducing the number. (This process is used in dealing with fractions and compound numbers.)

Reduction ascending. Reduction of compound numbers to a higher denomination is called reduction ascending.

Reduction descending. Reduction of compound numbers to a lower denomination is called reduction descending.

Remainder. The part of the dividend remaining when the division is not exact is called the remainder. The difference in subtraction is also called the remainder.

Root. One of the equal factors of a number is called a root. See also Square Root.

Scalene triangle. A triangle whose three sides are unequal is called a scalene triangle.

Separatrix. The comma used in separating periods in large numbers is called a separatrix.

Share. One of a specified number of equal parts of the capital stock of a company is called a share.

Similar fractions. If several fractions have the same denominator, they are said to be similar fractions.

Simple fraction. A common fraction whose terms are integral is called a simple fraction.

Solid. A magnitude that has length, breadth, and thickness is called a solid.

Square. A plane figure with four equal sides and four equal angles is called a square.

Square root. One of the two equal factors of a number is called its square root.

Stockholder. One who has stock in a corporation or company is called a stockholder.

Stocks. The shares of corporations generally are called stocks. Subtraction. The operation of finding the difference between two numbers is called subtraction.

Subtrahend. The number which is subtracted is called the sub

trahend.

Sum. The result in addition is called the sum.

Surface. A magnitude that has length and breadth, but not thickness, is called a surface.

Tax. Money assessed by a government for its support is called a tax.

Terms of a fraction. The numerator and denominator together are called the terms of the fraction.

Triangle. A plane figure formed by three straight lines is called a triangle.

Unit. Any one thing is called a unit. The number one is called unity.

Unit fraction. A common fraction whose numerator is 1 is called a unit fraction.

Volume. The number of cubic units a solid contains is called its volume.

Whole number. See Number.