Finding percentages | 5th grade Math Worksheet | GreatSchools - Parenting This math worksheet gives your child practice finding percentages of whole numbers. ... What's 30% of 140? This math worksheet gives your child practice finding percentages of whole numbers. ... Calculating percent, Multiplying fractions. Common Core Standards: Grade 5 Number & Operations: Fractions. CCSS.Math.Content.5.NF.B.4. This worksheet ...