`12% "of" 150+62% "of" 800=?`

Simplify:-- 12% of 50% of 8600 = ?

42% "of" 12% "of" (1)/(4)th "of" 1500=?

12% of 120 is 100.

What should come in place of the question mark (?) in the following questions: ?% of 550 - 12% of 150 = 125

What should come in place of the question mark (?) in the following questions ? 62% of 350 - ?% of 140 = 154

12% of 980 - ?% of 450 = 30% of 227

If 10% of A is equal to 12% of B,then 15% of A is equal to what per cent of B?

Find a. 15% of 7500g b. 12% of Rs 240 c. 8% of 120 km