Which of these are mathematical laws that us solve numerical problems? decimals graphs formulas percentages fractions

The mathematical laws that help us to solve numerical problems are:

Formulas.

Step-by-step explanation:

Decimals--

The decimals is just a numeral system which is used to represent an integer or an non-integer value.

Graphs--

The graphs are just a visual display of the data values  in the coordinate plane.

Formulas--

It is just a mathematical rule that is expressed in numerals or some other symbols and is used to solve a numerical problem.

Percentage--

In mathematics, a percentage is a number or a ratio expressed as a fraction of 100.

Fractions--

A fraction represent a part of something as a whole.

for example--

If a spinner has four sections of equal parts with different colors,.

Then the fraction of one part of the spinner is:

1/4

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m