Question 49: If the number B B is 10% less than another number C C and C C is 5% more than 150, then B B is equal to:

 

Question 49:
If the number $B$ is 10% less than another number $C$ and $C$ is 5% more than 150, then $B$ is equal to:
(a) 157.85 (b) 153.85 (c) 151.75 (d) 141.75

Step 1: Find C

$$C = 150 + 5\% \text{ of } 150 = 150 + 7.5 = 157.5$$

Step 2: Find B (10% less than C)

$$B = C - 10\% \text{ of } C = 157.5 - 15.75 = 141.75$$

✅ Answer: (d) 141.75

Tip for fast calculation:

• Quickly find percentages using decimal form:

$$5\% \text{ of 150} = 0.05 \times 150 = 7.5$$ $$10\% \text{ of 157.5} = 0.1 \times 157.5 = 15.75$$

• Subtract/add directly to get the final number.