Need on this answers these questions
1. 25% of 176 is what number
2. what is 90% of 20
3 24 is what percent of 30

1. 25% if 1/4, so we want to find 1/4 of 176. Best way to get the result is just divide 176 by 4, so 176:4=44 - its the answer.

2. To get the answer we can use proportion
100% 20
90% x
crossmultiply now
100x=90*20
100x=1800     /:100        divide both sides by 100
x=18 - its the answer

3. Similar problem
24 x
30 100%
crossmultiply now
24*100%=30x 
2400%=30x     /:30 divide both sides by 30
2400%:30=x
80%=x - its the answer