Three-fifths is usually written as 3/5, but it can also be written as 0.6. A calculator can be used to find the decimal form of a fraction by dividing the numerator by the denominator.
The easiest way to change a fraction into a decimal number is to use a calculator, but some numbers can also be changed by moving and looking at them. By multiplying the numerator and denominator by 2, the fraction 3/5 can be changed into the fraction 6/10. Most people can divide 6 by 10 by moving the decimal point one place to the left. This gives the correct decimal number, 0.6.