... is ofanother:What percentage of 75 is 15? Cross multiply: 15( 100) = ( 75) (x)1 ,50 0 = 75xᎏ1,7 5 500ᎏ= ᎏ77 5 5xᎏ20 = x Therefore, 20% of 75 is 15. Ratio and VariationA ratio is a ... SAT MATH SECTION– 157 56 58 SAT2006[04](fin).qx 11/21/ 05 6:44 PM Page 157 34. If 5% of a number is 20, what would 50 % of thatnumber be?a. 250 b. 100c. 200d. 400e. 50 0 35. Use the pattern ... SECTION– 155 56 58 SAT2006[04](fin).qx 11/21/ 05 6:44 PM Page 155 the road does not change; therefore, you knowto make the two expressions equal to each other:12x = 15( x – ᎏ14ᎏ)12x =15x – ᎏ14 5 ᎏ–15x...