# Today’s BrainWOD: “Estimating Percentages”

December 10, 2013 Lesson: Percentages

Skill: double-unders (scale to skipping for younger students)

Challenge: max double-unders in 2:00

BrainWOD: Without a calculator, estimate the number according to the percentages to one decimal point:

 55 % of 91 = ______ 65 % of 18 = ______ 49 % of 15 = ______ 2 % of 33 = ______ 95 % of 50 = ______
 89 % of 45 = ______ 94 % of 37 = ______ 92 % of 66 = ______ 48 % of 10 = ______ 98 % of 17 = ______
 57 % of 5 = ______ 58 % of 16 = ______ 66 % of 83 = ______ 31 % of 9 = ______ 47 % of 81 = ______
 49 % of 55 = ______ 59 % of 29 = ______ 86 % of 68 = ______ 82 % of 3 = ______ 52 % of 28 = ______
 37 % of 64 = ______ 95 % of 14 = ______ 93 % of 51 = ______ 85 % of 12 = ______ 3 % of 30 = ______

Max double-unders in two minutes (repeat.)

Calculate the number of double-unders completed in the first attempt, the second, and the two together. Older students: forecast the number of double-unders likely to occur in another two-minute attempt if increasing/decreasing trends continued.

Ignite BrainWODs are comprised of 7 phases (the Ignite 7 Steps.) Warmups, focus drills, pre-CrossFit Kids workouts and anchoring activities precede and follow this challenge for optimal benefit.

The Ignite 7 Steps are outlined in Enrichment Through Exercise, and taught in our NeuroMotive Coach Certifications.