Question

Find the difference,

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

Answer:

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

Step-by-step explanation:

a. Solution-

$= \frac{100}{120} - \frac{21}{60}$

$\frac{100 - 42}{120} \: where \: lcm = 120$

$= \frac{58}{120}$

$= \frac{29}{60}$

b. Solution-

$= \frac{5}{90} - \frac{1}{30}$

$= \frac{5 - 3}{90} \: where \: lcm = 90$

$= \frac{2}{90}$

$= \frac{1}{45}$

c. Solution-

$= \frac{5}{42} - \frac{1}{21}$

$= \frac{5 - 2}{42} \: where \: lcm = 42$

$= \frac{3}{42}$

$= \frac{1}{14}$

Adiós! Hope this helps you.