To find x % of y we multiply y by x/100
The original record of swimming was of 48 s.
Shreya clocked 25% faster than the previous record
So the new record is 25% faster than the previous record.
Now 25% of 48
= 0.25 × 48
= 12 s
This means the new record must have been clocked 12 s less than the old record.
So the new record shall be
=48-12
= 36 s
The new school record that Shreya set is of 36 seconds
