Chapter 21: Percentages, Percentage Change, Interest, Growth and Decay > EASY QUESTIONS (Questions 1-7)EASY QUESTIONS (Questions 1-7)Previous Question 1 of 71 / 7NextReveal all steps To convert a decimal to a percentage, multiply by 100. 0.35 × 100 = 35 Therefore, 0.35 = 35% Step 1: Convert the fraction to a decimal. 3/5 = 3 ÷ 5 = 0.6 Step 2: Convert the decimal to a percentage. 0.6 × 100 = 60 Therefore, 3/5 = 60% Method 1: Convert percentage to decimal and multiply. 25% = 25/100 = 0.25 25% of 80 = 0.25 × 80 = 20 Method 2: Use fractions. 25% = 1/4 1/4 of 80 = 80 ÷ 4 = 20 Therefore, 25% of 80 = 20. Step 1: Write as a fraction. 18 out of 45 = 18/45 Step 2: Convert to a percentage. 18/45 × 100 = 1800/45 = 40 Or: 18 ÷ 45 = 0.4, then 0.4 × 100 = 40 Therefore, 18 out of 45 = 40% Step 1: Calculate the discount amount. 15% of $40 = 0.15 × 40 = $6 Step 2: Subtract the discount from the original price. Sale price = $40 - $6 = $34 Therefore, the sale price is $34. Step 1: Find the actual increase. Increase = $60 - $50 = $10 Step 2: Calculate the percentage increase. Percentage increase = (Increase / Original) × 100 Percentage increase = (10 / 50) × 100 Percentage increase = 0.2 × 100 = 20% Therefore, the percentage increase is 20%. Convert 12% to a decimal and multiply. 12% = 12/100 = 0.12 12% of 250 = 0.12 × 250 = 30 Therefore, 12% of 250 = 30.
