Question

What is the per cent change when (a) 25 is increased 45 (b) 150 is decreased to 135?​

Answer 1

Answer:

1)

25 increase 45

45-25=20

mean 25 + 20

20 ÷25 X 100 = 80 %

25 -> 45 means 80% increasing of 25

2) 150 to 135

150-135 = 15

15÷150 X 100 = 10 %

mean 150 to 135 = 150- 10%

so 10 % decrease