Respuesta :

25% of 42=25 divided by 100 x 42 
25\100 x 42=10.5
'Of' in mathematics means 'multiply'. Change the 25% to a decimal by moving the percent sign two places to the left.

25% becomes .25.

Mutliply: .25 * 42 or 1/4 * 42

Answer: 10.5