If a device's data usage increases by 25% from 40 GB, what is the new usage?

If a device's data usage increases by 25% from 40 GB, what is the new usage?

• A. 50 GB
• B. 45 GB
• C. 60 GB
• D. 70 GB

Answer: (A)

When a value increases by a percentage, you add that percentage of the original amount. Here, 25% of 40 GB is 0.25 × 40 = 10 GB. Add that to the original 40 GB to get 50 GB. You can also multiply by 1.25: 40 × 1.25 = 50. The other options would correspond to different percentage increases (for example, 60 GB would be a 50% increase, 70 GB a 75% increase, etc.). So, the new usage is 50 GB.

When a value increases by a percentage, you add that percentage of the original amount. Here, 25% of 40 GB is 0.25 × 40 = 10 GB. Add that to the original 40 GB to get 50 GB. You can also multiply by 1.25: 40 × 1.25 = 50. The other options would correspond to different percentage increases (for example, 60 GB would be a 50% increase, 70 GB a 75% increase, etc.). So, the new usage is 50 GB.