Question

rita finished her chemistry assignment in 7/8 hours. Then she completed her math assignment in 1/4 hours. How much more time did rita spend on her chemistry assignment

Answer 1

Answer:

Rita spend $\frac{5}{8}$ of hour more on her chemistry assignment.

Step-by-step explanation:

Fraction of an hour Rita spent on chemistry assignment = $\frac{7}{8}$

Fraction of an hour Rita spent on math assignment = $\frac{1}{4}$

∴ Fraction of  hour Rita spent more on her chemistry assignment than math assignment

⇒  $\frac{7}{8}-\frac{1}{4}$

To subtract fractions we take LCD for 4 and 8. Since 8 is the least common multiple for 4 and 8 so, we take LCD= 8

To make the denominators same we need to multiply numerator and denominator of second fraction with 2.

⇒ $\frac{7}{8}-\frac{1\times2}{4\times2}$

⇒ $\frac{7}{8}-\frac{2}{8}$

After making the denominators common, we simply subtract numerators.

⇒ $\frac{7-2}{8}$

⇒ $\frac{5}{8}$

Therefore, Rita spend $\frac{5}{8}$ of hour more on her chemistry assignment.