How do you get the percent increase of 50 to 150?

Answer 1

Percent increase is ((new number divided by original number) -1) x 100

In your case 150/50 - 1 = 2 x 100 = 200%

Let me clarify above in algebra:

Let X = the original number and Y the new number, and the increase is Z

Then

X + ZX = Y

ZX = Y-X

Z = (Y-X)/X = Y/X -1

PERCENT INCREASE = 100Z