In a class, 1/7 of the time is spent on Mathematics, 2/21 on English and 1/14 on games. What fraction of the time is spent on ALL lessons EXCEPT games

5/21

Step-by-step explanation:

1/7 + 2/21 = ?

lcd of 7 and 21 is 21 so;

( 2/21 x 1/1) + 1/7 x 3/3) = 5/21

it has to have an angle of 90 degrees

t= half of the arc subtended by t.

r= half of the arc subtended by r.  

t+r= half of the arc subtended by t + half of the arc subtended by r= half of 360=180

step-by-step explanation: