explain 7/20-3/4 — step-by-step solution

Let's evaluate:

\frac{7}{20} - \frac{3}{4}

ⓘTo add fractions, put them over the same denominator, then add the numerators

\frac{7 - 3 \times 5}{20}

ⓘMultiplications are done before additions and subtractions:

-3 \times 5

-15

\frac{7 - 15}{20}

ⓘThe numerator and the denominator are computed before the division:

7 - 15

-8

- \frac{8}{20}

ⓘWe simplify the fraction by dividing the numerator and the denominator by the number

4

- \frac{8}{20}

\frac{-2 \times 4}{5 \times 4}

- \frac{2}{5}

▶Result:

- \frac{2}{5}

The approximate value of:

- \frac{2}{5}

equals:

▷

-0.4