Math Magic - Dividing By 25


HOME Miscellaneous Elementary GCD LCM Definitions Percents Ratios Square Roots Reverses Junior High Cube Roots Mult By 9 (#1) Mult By 9 (#2) Mult By 8 Polynomials Positive Integral Divisors Sum Of Positive Integral Divisors Relatively Prime Triangular Numbers Remainders Divide By 40 Divide By 25 Divide By 9 High School Pentagonal Numbers Hexagonal Numbers Heptagonal Numbers Octagonal Numbers Manipulating Polygonal Numbers Dividing Factorials #1 Dividing Factorials #2 Solving Triangular Numbers		(View/Download .pdf file) Dividing by 25 into a fraction/decimal: A. Dividing by 25 into a decimal or a percent is easy since: n ₌ 4n 25 100 B. Therefore, we can multiply by 4 and divide by 100. Ex [1] ⁷/₂₅ = __________(decimal). a. Multiply: 7 x 4 = 28. b. 28 / 100 = .28. c. The answer is .28. Ex [2] ²³/₂₅ = __________(percent). a. 23 x 4 = 92. b. 92 / 100 = .92. c. As a percent, .92 is 92%. d. The answer is 92. C. Notice, as in Ex [2], that when changing to a percent, you only need to multiply by 4.