Question

Simplify: 2 / 3 + ( −4 / 5 ) + 7/15 + ( -1 / 20 )

Answer 1

$\: \: \: \frac{2}{3} + ( \frac{ - 4}{5} ) + \frac{7}{15} +( \frac{ - 1}{20} ) ={?}$

LCM of 3, 5, 15, and 20 = 60

$= \frac{(2 \times 30) + ( - 4 \times 12) + (7 \times 4) + ( - 1 \times 3)}{60}$

$= \frac{60 + ( - 48) + 28 + ( - 3)}{60}$

$= \frac{60 - 48 + 28 - 3}{60}$

$= \frac{28 + 60 - 48 - 3}{60}$

$= \frac{28 + 60 - 51}{60}$

$= \frac{88 - 51}{60}$

$= \frac{37}{60}$

hope it helps you