Question

What's number is 35% of 20

Answer 1

7 is 35% of 20

Convert percentage into a decimal: 35%/100 = 0.35
Multiply decimal by 20: 0.35 × 20 = 7 <-- our answer.

Answer 2

'is' in mathematics means equal
'of' in mathematics means multiplication

35% can also be written as 35/100

$x = \frac{35}{100} \times 20\\\\x = \frac{35}{10} \times 2\\\\x = 3.5 \times 2\\\\\boxed{\bf{x = 7}}$