1. What is 25% of 100?
2. What is 37% of 100?
3. What is 152% of 100?
4. What is 28% of 57?
5. What is 13% of 235?
6. What is 78% of 128?
7. Of 25, what is 90%?
8. What is 145% of 25?
9. Of 28, what is 136%?
10. What is 5% of 356?
11. A 350 mL beaker is filled with a 12.8% acid solution, how many mL are acid?
12. In a class of 320 students, 55% are female, how many of the students are female?
13. A steel plate is 45% iron. If the total weight of the plate is 500 kg, what is the weight of iron?
14. In a class of 50 students, 12% are expected to fail. How many students will pass?
15. A bicycle has a listed price of $349.99. If tax is at 6.9%, what is the tax on the bike? Round to the nearest cent.

Question

EmmaGraceJohnson · Answer

Let's break down each question and find the answers step-by-step using the concept of percentages: 
 
 What is 25% of 100? To find 25% of 100, multiply 100 by 0.25 (since 25% = 25/100 = 0.25): 100 × 0.25 = 25 
 
 What is 37% of 100? Multiply 100 by 0.37: 100 × 0.37 = 37 
 
 What is 152% of 100? Multiply 100 by 1.52: 100 × 1.52 = 152 
 
 What is 28% of 57? Multiply 57 by 0.28: 57 × 0.28 = 15.96 
 
 What is 13% of 235? Multiply 235 by 0.13: 235 × 0.13 = 30.55 
 
 What is 78% of 128? Multiply 128 by 0.78: 128 × 0.78 = 99.84 
 
 Of 25, what is 90%? Multiply 25 by 0.90: 25 × 0.90 = 22.5 
 
 What is 145% of 25? Multiply 25 by 1.45: 25 × 1.45 = 36.25 
 
 Of 28, what is 136%? Multiply 28 by 1.36: 28 × 1.36 = 38.08 
 
 What is 5% of 356? Multiply 356 by 0.05: 356 × 0.05 = 17.8 
 
 A 350 mL beaker is filled with a 12.8% acid solution, how many mL are acid? Multiply 350 by 0.128: 350 × 0.128 = 44.8 mL of acid 
 
 In a class of 320 students, 55% are female, how many of the students are female? Multiply 320 by 0.55: 320 × 0.55 = 176 females 
 
 A steel plate is 45% iron. If the total weight of the plate is 500 kg, what is the weight of iron? Multiply 500 by 0.45: 500 × 0.45 = 225 kg of iron 
 
 In a class of 50 students, 12% are expected to fail. How many students will pass? First, find how many students are expected to fail: 50 × 0.12 = 6 students. Subtract the number of students failing from the total: 50 − 6 = 44 students will pass. 
 
 A bicycle has a listed price of $349.99. If tax is at 6.9%, what is the tax on the bike? Round to the nearest cent. Multiply $349.99 by 0.069: 349.99 × 0.069 ≈ 24.15 . The tax on the bike is approximately $24.15.

Answer (1)

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