20000 = 100% so we need to find 1% first so we can find the 40% that will be accepted
20000 : 100 = 200 (that's 1%)
to find 40% we multiply 200×40= 8000 people accepted
we need to find the 25% of those 8000 so again we divide by 100
8000 : 100 = 80
80 × 25 = 2000 people
hopefully it's correct good luck