Answer:
1/40 of an hour
Explanation:
She texted her friend for 3/5 of an hour
She brushed and put pyjamas for 3/8 of an hour
To find the total time spend so we need to add 3/5 an d 3/8.
For adding these fractions we need to equate their denominator's LCM
LCM of 5 and 8 are 40
So (3/5*8/8) + (3/8*5/5)
(24/40) + (15/40)
24+15/40
39/40 of an hour.
So we can say the time spent reding by her: (40/40) - (39/40)
i.e., 1/40