Find the difference,

a.100/120-21/60
b. 5/90-1/30
c. 5/42-1/21
please answer fast
answer in step b

1 thought on “Find the difference, <br /><br />a.100/120-21/60<br />b. 5/90-1/30<br />c. 5/42-1/21<br />please answer fast<br />answer in step b”

1. Answer:

   1. 29/60
   2. 1/45
   3. 1/14

   Step-by-step explanation:

   a. Solution-

   [tex] = \frac{100}{120} – \frac{21}{60} [/tex]

   [tex] \frac{100 – 42}{120} \: where \: lcm = 120[/tex]

   [tex] = \frac{58}{120} [/tex]

   [tex] = \frac{29}{60} [/tex]

   b. Solution-

   [tex] = \frac{5}{90} – \frac{1}{30} [/tex]

   [tex] = \frac{5 – 3}{90} \: where \: lcm = 90[/tex]

   [tex] = \frac{2}{90} [/tex]

   [tex] = \frac{1}{45} [/tex]

   c. Solution-

   [tex] = \frac{5}{42} – \frac{1}{21} [/tex]

   [tex] = \frac{5 – 2}{42} \: where \: lcm = 42[/tex]

   [tex] = \frac{3}{42} [/tex]

   [tex] = \frac{1}{14} [/tex]

   Adiós! Hope this helps you.

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