How can I find 30% of 2140?
30% of 2140 is 642Convert percentage into a decimal: 30%/100 = 0.3Multiply decimal by 2140: 0.3 × 2140 = 0.3 <-- our answer.
'is' in mathematics means equal'of' in mathematics means multiplication30% can also be written as 30/100\(x = \frac{30}{100} \times 2140\\\\x = \frac{3}{10} \times 2140\\\\x = 3 \times 214\\\\\boxed{\bf{x=642}}\)
