Explanation

Step-by-step solution:

• 10% of 20 =$frac{10}{100} times 20 = 2$
• 20% of 10 = 20/100​×10=2

Now add both: 2+2=4

Last updated question by NA on 07 May 2026

Explanation

Step 1: Translate the statement into an equation

“One-fourth of one-third of two-fifths of a number is 15”

1​/4×1/3​×2​/5×x=15

Step 2: Multiply fractions

1×1×2/4×3×5​=2/60​= 1/30​

So,

1/30​x=15

Step 3: Solve for x

$$x=15\times 30=450$$

So, the number is

$$x = 450$$

Step 4: Find 40% of the number

40% of 450= 40/100​×450
$$=0.4\times 450=180$$

Last updated question by NA on 07 May 2026

Explanation

To find a single equivalent discount, we apply successive discounts step by step.
Assume original price = 100
Step 1: 10% discount
100 → 90
Step 2: 20% discount on 90
90 → 72
Step 3: 40% discount on 72
72 → 43.2
Final price = 43.2
Total discount:
100 − 43.2 = 56.8

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Last updated by NS on 01 MAY 2026

Explanation

50% of 75% of 200:

• 75% of 200 = 150
• 50% of 150 = 75

Explanation