37.5% decrease.
Oh, dude, it's like finding out how much your favorite snack has shrunk in size. To calculate the percent of change, you subtract the starting number from the final number, divide that by the starting number, and then multiply by 100. So, for this problem, it would be (85 - 136) / 136 * 100. Just plug and chug, my friend.
136
The number 160
-37.5%
Original Price x .85 = 136 Original price = 136/.85 (If you are allowed to use a calculator, you are done here.) IF not, factor and cancel... 136X100/85 = 2x2x2x17x2x2x5x5/17x5 = 2x2x2x2x2x5 = 32 x 5 = 160 160
0.85
70%
85% decrease.
when does this go in effect
17/20
17/20 to a decimal and a percent = 0.85; 85%
136%