Which is bigger, 80% of 150 or 3/4 of 200

80% of 150
step 1: 80% is a percentage, so you convert that into a decimal(just move it over two places) 

step 2: Multiply  .80(150)= 120 

3/4 of 200
step 1: 3/4 is also 75% 
step 2: 75% is a percent, so you change that into .75 
step 3: Multiply .75(200)= 150 

So 3/4 of 200 is bigger

31 is prime. and it’s prime factorization is just 31.