Introduction to Ratios

The sum of the three angles of a triangle $ABC$ is $180°$. The ratio of $\angle BAC, \angle ABC \& \angle ACB$ is $3:4:11$. If the value of $\angle ABC$ is increased by $15°$ and the value of $\angle ACB$ is decreased by $30°$. Let's calculate the new ratio of the three angles.

Of the $60$ persons working in an office, $20$ are men and the remaining are women. Find the ratio of the number of: men to that of women, men to the total number of persons and persons to that of women.

A Java book is comprised of two sections core and advanced Java in the ratio $7:2$. How much of each type of content will be needed to make a book of $450$ pages?

Tanaya divide the collection of $240$ stamps between his two sisters Shamali and Keya in a ratio of $3:5$. Find the number of stumps each of the sisters received.

If$₹800$ when divided in the ratio of $3:5$ is $₹ k \text{and} ₹ m$, then the value of $k+m$ is

The ratio of $8$ hours to $2$ days is:

In the ratio $12:15$ which one is antecedent?

There are $\mathrm{b}$ boys and $\mathrm{g}$ girls in a class. The ratio of the number of boys to the total number of students in the class is

Rafi has $16$ red marbles and $4$ blue marbles. Find the ratio of red marbles to blue marbles Rafi has?

Find the ratio of the area of the shaded portion to that of the whole.

 For the given ratios, find their simplest form and complete the table.

Find the ratio of $40 \mathrm{minutes}$ to $1.5 \mathrm{hours}$ in minutes to simplest form.